Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
www.united.com/main.652a551221f08a6b2c8d.js	0.0 ms	1.1 MiB
www.united.com/5566.7b89798c7cee54d27513.js	0.0 ms	858.4 KiB
www.united.com/e12cc94d54b308001cb2.placeholder_desktop.webp	0.0 ms	429.9 KiB
tags.tiqcdn.com/utag/unitedairlines/united-v3/prod/utag.js	300.0 s	406.1 KiB
www.united.com/de03c2916e8b84cccdb6.u100-DesktopWeb.webp	0.0 ms	318.6 KiB
cdn.quantummetric.com/qscripts/quantum-united.js	300.0 s	259.4 KiB
cdn.optimizely.com/js/27764480084.js	120.0 s	234.4 KiB
www.united.com/86183.c838589b9ae3afc69023.chunk.js	0.0 ms	177.2 KiB
/lptag/api/account/84608747/configuration/applications/ta...	630.0 s	137.3 KiB
cdn-prod.securiti.ai/consent/cookie-consent-sdk-latest.js	0.0 ms	114.0 KiB
www.united.com/3mZEiYvQPZ/f--chewpqN/J9hihpaY1r3VS0VEOS/CzlpAQ/PC/ZKWzBDLQAC	21600.0 s	176.8 KiB
www.united.com/72620.d756b6273507471e3afb.chunk.js	0.0 ms	111.1 KiB
www.united.com/65897.c96bc1feb607ab4c2807.chunk.js	0.0 ms	103.1 KiB
/3mZEiYvQPZ/f--chewpqN/rQhihpaY1r3V/T3xxAQ/Yx/VdCwwjXSAOA...	21600.0 s	154.9 KiB
www.united.com/65880.a937d4750aeb9e94108e.chunk.js	0.0 ms	91.4 KiB
www.united.com/87558.97b4c78c6beee453f960.chunk.js	0.0 ms	79.3 KiB
c.amazon-adsystem.com/aax2/apstag.js	3600.0 s	90.8 KiB
www.united.com/public/5f38d84750bc89adb299679cfbd033a0e193ad07d445	600.0 s	62.1 KiB
www.united.com/42449.765cb9fce991dd230e13.chunk.js	0.0 ms	56.3 KiB
www.united.com/74640.f61ba13fae29248d39a2.chunk.js	0.0 ms	54.3 KiB
www.united.com/fonts/NeuePlakTextforUnited-Rg.woff2	0.0 ms	47.3 KiB
www.united.com/47143.e5cf3124466f664d3f48.chunk.js	0.0 ms	47.3 KiB
www.united.com/fonts/NeuePlakTextforUnited-SmBd.woff2	0.0 ms	47.3 KiB
www.united.com/13292.1bd297fb4fcfa16106cf.chunk.js	0.0 ms	46.1 KiB
www.united.com/fonts/NeuePlakforUnited-Bd.woff2	0.0 ms	45.9 KiB
www.united.com/fonts/NeuePlakforUnited-SmBd.woff2	0.0 ms	44.6 KiB
www.united.com/fonts/NeuePlakforUnited-Rg.woff2	0.0 ms	44.5 KiB
www.united.com/6580.c41fc5933cf6d4e27260.chunk.js	0.0 ms	41.0 KiB
/public/5f38d84750bc89adb299679cfbd033a0e193ad07d445/e/65...	600.0 s	32.0 KiB
www.united.com/93241.85332fd65a73eb68173b.chunk.js	0.0 ms	26.1 KiB
www.united.com/69747.8a019d2c8733a17cf603.chunk.js	0.0 ms	25.0 KiB
www.united.com/6f949b1423b88620db51.chaseDefault_error.webp	0.0 ms	23.0 KiB
www.united.com/93224.48b0b2ffe02a26ca2e63.chunk.js	0.0 ms	22.7 KiB
www.united.com/27901.18f1a1335e11a0c997aa.chunk.js	0.0 ms	22.3 KiB
www.united.com/runtime.dd9a111f6af6dbdaff1d.js	0.0 ms	20.6 KiB
/pagead/managed/js/adsense/m202604100101/show_ads_impl_fy...	1209600.0 s	177.6 KiB
/public/5f38d84750bc89adb299679cfbd033a0e193ad07d445/e/65...	600.0 s	18.2 KiB
www.united.com/62331.0b3c11c242410281ba0c.chunk.js	0.0 ms	15.5 KiB
www.united.com/4205.7dd59f352b5434b55ee2.chunk.js	0.0 ms	15.5 KiB
www.united.com/48348.94f444bd6b6d93cb16cc.chunk.js	0.0 ms	14.6 KiB
www.united.com/63748.a61af0a4f340fc47c468.chunk.js	0.0 ms	14.3 KiB
www.united.com/8534.d31300627133a92013e4.chunk.js	0.0 ms	14.0 KiB
cdn-prod.securiti.ai/consent/cookie-consent-latest.css	0.0 ms	11.6 KiB
www.united.com/98875.d741f81126159c781d58.chunk.js	0.0 ms	11.1 KiB
www.united.com/3mZEiYvQPZ/f--chewpqN/rQhip3/QTFMAQ/TA/owBVU1XUUp	86400.0 s	27.6 KiB
www.united.com/41731.fc007be9a0e754ba7e96.chunk.js	0.0 ms	10.3 KiB
www.united.com/58051.096a6a2207e82a3548d0.chunk.js	0.0 ms	10.0 KiB
lptag.liveperson.net/tag/tag.js?site=84608747	630.0 s	10.7 KiB
www.united.com/94768.0f261077d6309b779275.chunk.js	0.0 ms	9.7 KiB
www.united.com/20229.c34ed143fd0fc9bef1c4.chunk.js	0.0 ms	9.6 KiB
www.united.com/48254.2c6bd5626eb26f7556ff.chunk.js	0.0 ms	9.5 KiB
www.united.com/73686.4eb28abbe3ef10f60977.chunk.js	0.0 ms	9.3 KiB
www.united.com/19428.a76da8da0e6d77e939ba.chunk.js	0.0 ms	9.3 KiB
tagan.adlightning.com/united-web/op.js	1800.0 s	9.7 KiB
www.united.com/32579.8c821a2aa16aa2cf68f9.chunk.js	0.0 ms	8.3 KiB
www.united.com/56466.53ceedcfef379f610d41.chunk.js	0.0 ms	8.2 KiB
www.united.com/78125.c63b679eea1179887171.chunk.js	0.0 ms	7.8 KiB
www.united.com/14136.852cc2318dffcd047bf0.chunk.js	0.0 ms	7.7 KiB
www.united.com/65848.2e75b53010d312fb551a.chunk.js	0.0 ms	7.6 KiB
www.united.com/30688.d1d1826c4388a94ab46e.chunk.js	0.0 ms	7.3 KiB
www.united.com/49959.d761794153c8ab60ac88.chunk.js	0.0 ms	7.1 KiB
www.united.com/32709.c81a11e4714690c50cc2.chunk.js	0.0 ms	6.9 KiB
/public/5f38d84750bc89adb299679cfbd033a0e193ad07d445/e/65...	600.0 s	7.2 KiB
www.united.com/72220.70db10dafbfd412e1e2f.chunk.js	0.0 ms	6.3 KiB
apps.rokt.com/icons/rokt-icons.woff	1200.0 s	7.1 KiB
www.united.com/88682.5ac39cf7d448ebff255e.chunk.js	0.0 ms	6.2 KiB
www.united.com/94318.d7292d14a639ab9349a6.chunk.js	0.0 ms	6.1 KiB
www.united.com/akam/13/642d12c7	21600.0 s	9.5 KiB
www.united.com/63493.3736a0f91857ed749392.chunk.js	0.0 ms	6.0 KiB
s.go-mpulse.net/boomerang/AQZRX-VXQB5-F7UMP-G9UYD-LGHKM	604800.0 s	58.4 KiB
www.united.com/6511.fdafd8bae8f43a60d658.chunk.js	0.0 ms	5.7 KiB
www.united.com/15009.fa3fc4f01f31b1ff6512.chunk.js	0.0 ms	5.6 KiB
cdn-prod.securiti.ai/consent/cookie-consent-sdk-loader.js	0.0 ms	5.6 KiB
www.united.com/92345.c4a33d94586cc2bcd636.chunk.js	0.0 ms	5.5 KiB
www.united.com/9558.5da42f8e2e08ec0475fe.chunk.js	0.0 ms	5.3 KiB
www.united.com/72113.4fc217e4276e3d2d7d83.chunk.js	0.0 ms	5.3 KiB
www.united.com/72936.54d3cd4bff2e8c3038d8.chunk.js	0.0 ms	5.2 KiB
www.united.com/74424.f7ec1c732e4d6f9f0c49.chunk.js	0.0 ms	5.0 KiB
www.united.com/69398.5dddec992f3e733798e1.chunk.js	0.0 ms	4.9 KiB
www.united.com/39268.b0cb01610ab64510ef27.chunk.js	0.0 ms	4.8 KiB
www.united.com/21370.9fd5d8a5d5172d424bb0.chunk.js	0.0 ms	4.8 KiB
www.united.com/49942.d96862352dbf50bbd641.chunk.js	0.0 ms	4.7 KiB
www.united.com/6909.d4ec7b09874bce1a31d2.chunk.js	0.0 ms	4.6 KiB
www.united.com/85356.7cbbe7c2c3a95a9e1659.chunk.js	0.0 ms	4.5 KiB
www.united.com/58120.6d98f48edece299bb661.chunk.js	0.0 ms	4.5 KiB
www.united.com/40808.ad29ac8a63d64d9355d7.chunk.js	0.0 ms	4.4 KiB
/consent/auto_blocking/31270bbd-6025-4430-a211-12fb9c5112...	86400.0 s	10.4 KiB
/lptag/api/account/84608747/configuration/applications/ta...	630.0 s	4.5 KiB
www.united.com/47193.7f901e4f5ffcda0309da.chunk.js	0.0 ms	4.0 KiB
www.united.com/60691.fa2d1cf6bcd717080185.chunk.js	0.0 ms	4.0 KiB
www.united.com/3149651732b3c9591453.UnitedLogoInverted.svg	0.0 ms	3.8 KiB
www.united.com/52111.fb4212078ea86d443ed8.chunk.js	0.0 ms	3.8 KiB
www.united.com/4098.d0acf8f3cd09edda2ce0.chunk.js	0.0 ms	3.7 KiB
www.united.com/58863.a2c391d5d5b935302a24.chunk.js	0.0 ms	3.6 KiB
www.united.com/83381.22f77d0f1467c4ef9033.chunk.js	0.0 ms	3.6 KiB
www.united.com/27665.cbd29ff22d6002cf35e4.chunk.js	0.0 ms	3.1 KiB
cdn.quantummetric.com/network-interceptor/quantum-united.js	300.0 s	3.1 KiB
www.united.com/78606.af9ec7c7ad162ff0c26f.chunk.js	0.0 ms	2.9 KiB
www.united.com/28245.9b2b6664b68b3db92b2d.chunk.js	0.0 ms	2.7 KiB
www.united.com/78660.1f139c3b0ca9544ef26e.chunk.js	0.0 ms	2.7 KiB
www.united.com/41656.82002b5d3d8ef6a1bd35.chunk.js	0.0 ms	2.7 KiB
www.united.com/2500e4e62233fbfe8ac6.unitedLogoNew.svg	0.0 ms	2.7 KiB
www.united.com/87618.43a4350f614891f83c23.chunk.js	0.0 ms	2.6 KiB
www.united.com/80377.cb55a3381241341cf3d9.chunk.js	0.0 ms	2.5 KiB
www.united.com/76780.714874b1a4536ece5e2d.chunk.js	0.0 ms	2.5 KiB
/utag/unitedairlines/united-v3/prod/utag.1.js?utv=ut4.51....	300.0 s	2.6 KiB
www.united.com/52800.2339e88f77405c7f0655.chunk.js	0.0 ms	2.4 KiB
/maps/api/js?libraries=core&key=AIzaSyDWsu3tPbwQ4M8smrxny...	1800.0 s	2.8 KiB
www.united.com/13117.28be4932714858b32b37.chunk.js	0.0 ms	2.4 KiB
www.united.com/81437.294bf9a30d8d6a75bc3d.chunk.js	0.0 ms	2.4 KiB
www.united.com/57218.c332928c3bdb95408fae.chunk.js	0.0 ms	2.4 KiB
www.united.com/63553.ff7edc83706d2374f459.chunk.js	0.0 ms	2.4 KiB
www.united.com/72833.355a79c176b2674187d5.chunk.js	0.0 ms	2.3 KiB
www.united.com/6476.e8faed16c818874d2970.chunk.js	0.0 ms	2.2 KiB
www.united.com/45810.7607fdd4ce345b6775ab.chunk.js	0.0 ms	2.2 KiB
www.united.com/dd45368f41b2bc6e1df9.StarAlliance.svg	0.0 ms	2.1 KiB
www.united.com/46703.f5e184e25d0eb3e5e97d.chunk.js	0.0 ms	2.0 KiB
www.united.com/51206.3e48f6f70b1b4c43c5b2.chunk.js	0.0 ms	2.0 KiB
www.united.com/23076.89c7e3f5ec12b8d7e745.chunk.js	0.0 ms	2.0 KiB
www.united.com/93621.5da89fbd437292896033.chunk.js	0.0 ms	2.0 KiB
/public/5f38d84750bc89adb299679cfbd033a0e193ad07d445/e/64...	600.0 s	2.1 KiB
www.united.com/22347.e72c14d930c68dda1db7.chunk.js	0.0 ms	1.9 KiB
www.united.com/96983.34e2063044942d7db7b1.chunk.js	0.0 ms	1.8 KiB
/utag/unitedairlines/united-v3/prod/utag.145.js?utv=ut4.5...	300.0 s	1.9 KiB
www.united.com/73215.3b09f5a691da4f88f8cc.chunk.js	0.0 ms	1.8 KiB
www.united.com/81225.1036f6ccbed7dc6ec07e.chunk.js	0.0 ms	1.7 KiB
www.united.com/91017.51fff216c6fdf4bfc9cb.chunk.js	0.0 ms	1.7 KiB
www.united.com/58875.967afa3ce74356bf35f3.chunk.js	0.0 ms	1.7 KiB
www.united.com/31302.f62e1d67693486551c90.chunk.js	0.0 ms	1.7 KiB
www.united.com/57097.75bcfcef6cb98caef0a2.chunk.js	0.0 ms	1.7 KiB
www.united.com/90699.230708ac56e73b75201a.chunk.js	0.0 ms	1.6 KiB
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www.united.com/34447.ac7e80600f3d1a12de2b.chunk.js	0.0 ms	1.5 KiB
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www.united.com/11669.0fcbede52458a8b120aa.chunk.js	0.0 ms	1.2 KiB
static-assets.dev.fs.liveperson.com/united/unitedJS.js	0.0 ms	1.2 KiB
www.united.com/64798.121bd9570fa7bdfb3179.chunk.js	0.0 ms	1.2 KiB
www.united.com/14924.060eb345bb4c4d32983b.chunk.js	0.0 ms	1.2 KiB
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www.united.com/927e243ba1a12322b7ca.plane.svg	0.0 ms	938 B
www.united.com/035a25a288ddfc2bf712.check-circle.svg	0.0 ms	933 B
www.united.com/1b7cce7bdabf684d295b.clock.svg	0.0 ms	890 B
www.united.com/28827.6d03d98dfa91caf820b9.chunk.js	0.0 ms	832 B
www.united.com/e2b54c9039e6f164486e.external-link-white.svg	0.0 ms	831 B
www.united.com/21960.f2dd70820ecefc043436.chunk.js	0.0 ms	830 B
www.united.com/58405.86cfd4bb88c342740907.chunk.js	0.0 ms	809 B
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www.united.com/7350.fb53cf75d428a1eb08ea.chunk.js	0.0 ms	733 B
config.aps.amazon-adsystem.com/configs/ca1ef811-dfb2-456b-8e49-f17853a01790	3600.0 s	809 B
www.united.com/8570.f1a9f5e0139e31dfdc7c.chunk.js	0.0 ms	627 B
www.united.com/3mZEiYvQPZ/f--chewpqN/rQhip3/QTFMAQ/WR/MCDV4MARlZ	86400.0 s	1.3 KiB
/utag/tiqapp/utag.v.js?a=unitedairlines/united-v3/2026040...	300.0 s	433 B
cdn-prod.securiti.ai/consent/cookie-consent-latest.css	0.0 ms	0 B

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]

items: [map[node:map[type:text value:Total] score:0.21212999999999999] map[node:map[boundingRect:map[bottom:2619 height:781 left:0 right:1350 top:1838 width:1350] lhId:page-5-FOOTER nodeLabel:Popular topics Search Wi-Fi Change flight United Club Traveling with pets Milea… path:1,HTML,1,BODY,7,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,4,DIV,2,FOOTER selector:div.page > div.atm-c-provider__globalcss-allowed > div.relativePosition > footer snippet:<footer role="contentinfo"> type:node] score:0.103802] map[node:map[boundingRect:map[bottom:1749 height:916 left:0 right:1350 top:833 width:1350] lhId:page-7-DIV nodeLabel:Explore destinations Not sure where to go? Use our interactive map to find flig… path:1,HTML,1,BODY,7,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,4,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,MAIN,1,DIV,1,SECTION,2,DIV,0,DIV,0,DIV selector:section.app-containers-InspirationBlock-inspirationBlock__inspirationBlock--Fws0r > div > div#mapPlacesWrapper > div.app-components-Places-styles__placesContainer--SGywk snippet:<div class="app-components-Places-styles__placesContainer--SGywk"> type:node] score:0.046554] map[node:map[boundingRect:map[bottom:1749 height:916 left:0 right:1350 top:833 width:1350] lhId:page-7-DIV nodeLabel:Explore destinations Not sure where to go? Use our interactive map to find flig… path:1,HTML,1,BODY,7,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,4,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,MAIN,1,DIV,1,SECTION,2,DIV,0,DIV,0,DIV selector:section.app-containers-InspirationBlock-inspirationBlock__inspirationBlock--Fws0r > div > div#mapPlacesWrapper > div.app-components-Places-styles__placesContainer--SGywk snippet:<div class="app-components-Places-styles__placesContainer--SGywk"> type:node] score:0.046554] map[node:map[boundingRect:map[bottom:2619 height:781 left:0 right:1350 top:1838 width:1350] lhId:page-5-FOOTER nodeLabel:Popular topics Search Wi-Fi Change flight United Club Traveling with pets Milea… path:1,HTML,1,BODY,7,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,4,DIV,2,FOOTER selector:div.page > div.atm-c-provider__globalcss-allowed > div.relativePosition > footer snippet:<footer role="contentinfo"> type:node] score:0.012195] map[node:map[boundingRect:map[bottom:679 height:112 left:811 right:1243 top:567 width:432] lhId:page-6-BUTTON nodeLabel:Learn how to get rewarded with the United℠ Explorer Card path:1,HTML,1,BODY,7,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,4,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,MAIN,0,SECTION,1,DIV,0,DIV,0,DIV,0,BUTTON selector:div.app-components-HomeTop-homeTop__ad--avLyf > div.app-components-HomeTop-homeTop__adPlacement--XWWYn > div.app-components-HomeTop-homeTop__adPlacementInner--akpfz > button.app-containers-Ad-ad__adContent--gAgPf snippet:<button role="link" class="app-containers-Ad-ad__adContent--gAgPf app-components-HomeTop-homeTop__adU…" aria-describedby="extDisclaimer" target="_blank" data-test-id="ad-banner"> type:node] score:0.002644 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:679 height:112 left:811 right:1243 top:567 width:432] lhId:page-21-IMG nodeLabel:Learn how to get rewarded with the United℠ Explorer Card path:1,HTML,1,BODY,7,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,4,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,MAIN,0,SECTION,1,DIV,0,DIV,0,DIV,0,BUTTON,0,IMG selector:div.app-components-HomeTop-homeTop__adPlacement--XWWYn > div.app-components-HomeTop-homeTop__adPlacementInner--akpfz > button.app-containers-Ad-ad__adContent--gAgPf > img.app-containers-Ad-ad__heroLayout--QTd6I snippet:<img class="app-containers-Ad-ad__heroLayout--QTd6I" src="/6f949b1423b88620db51.chaseDefault_error.webp" alt="Learn how to get rewarded with the United℠ Explorer Card" data-test-id="banner-img"> type:node]]] type:subitems]]]

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2	60 ms

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]

items: [map[duration:232.745 label:Time to first byte subpart:timeToFirstByte] map[duration:2223.603 label:Resource load delay subpart:resourceLoadDelay] map[duration:57.945 label:Resource load duration subpart:resourceLoadDuration] map[duration:205.506 label:Element render delay subpart:elementRenderDelay]]

lhId: page-0-DIV

nodeLabel: div.app-components-HomeTop-homeTop__rightPanelStyle--qpUKu > div#carousel-background-landing > div > div.app-components-CrossfadeImage-crossfadeimage__fader--aXX5X

path: 1,HTML,1,BODY,7,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,4,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,MAIN,0,SECTION,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV

selector: div.app-components-HomeTop-homeTop__rightPanelStyle--qpUKu > div#carousel-background-landing > div > div.app-components-CrossfadeImage-crossfadeimage__fader--aXX5X

snippet: <div class="app-components-CrossfadeImage-crossfadeimage__fader--aXX5X" role="presentation" style="background-image: url("/e12cc94d54b308001cb2.placeholder_desktop.webp");">

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-DIV

nodeLabel: div.app-components-HomeTop-homeTop__rightPanelStyle--qpUKu > div#carousel-background-landing > div > div.app-components-CrossfadeImage-crossfadeimage__fader--aXX5X

path: 1,HTML,1,BODY,7,DIV,0,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,4,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,MAIN,0,SECTION,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV

selector: div.app-components-HomeTop-homeTop__rightPanelStyle--qpUKu > div#carousel-background-landing > div > div.app-components-CrossfadeImage-crossfadeimage__fader--aXX5X

snippet: <div class="app-components-CrossfadeImage-crossfadeimage__fader--aXX5X" role="presentation" style="background-image: url("/e12cc94d54b308001cb2.placeholder_desktop.webp");">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
www.united.com/3mZEiYvQPZ/f--chewpqN/J9hihpaY1r3VS0VEOS/CzlpAQ/PC/ZKWzBDLQAC	176.8 KiB	162 ms
www.united.com/public/5f38d84750bc89adb299679cfbd033a0e193ad07d445	62.1 KiB	81 ms
www.united.com/3mZEiYvQPZ/f--chewpqN/rQhip3/QTFMAQ/WR/MCDV4MARlZ	1.3 KiB

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
Banner: 100 years of United logo `div.atm-l-section > div#united-100-logo-container > div.app-components-GlobalFooter-united100Logo-styles__united100LogoContainer--zbzZJ > img.app-components-GlobalFooter-united100Logo-styles__united100LogoImage--rkFF3`	www.united.com/de03c2916e8b84cccdb6.u100-DesktopWeb.webp	317.8 KiB	300.1 KiB
Learn how to get rewarded with the United℠ Explorer Card `div.app-components-HomeTop-homeTop__adPlacement--XWWYn > div.app-components-HomeTop-homeTop__adPlacementInner--akpfz > button.app-containers-Ad-ad__adContent--gAgPf > img.app-containers-Ad-ad__heroLayout--QTd6I`	www.united.com/6f949b1423b88620db51.chaseDefault_error.webp	22.5 KiB	16.8 KiB
div > div > div > img `div > div > div > img`	/maps/vt?pb=!1m5!1m4!1i4!2i2!3i4!4i256!2m3!1e0!2sm!3i7755...	22.7 KiB	12.0 KiB
div > div > div > img `div > div > div > img`	/maps/vt?pb=!1m5!1m4!1i4!2i1!3i4!4i256!2m3!1e0!2sm!3i7755...	20.7 KiB	10.0 KiB
div > div > div > img `div > div > div > img`	/maps/vt?pb=!1m5!1m4!1i4!2i2!3i5!4i256!2m3!1e0!2sm!3i7755...	17.3 KiB	6.6 KiB
div > div > div > img `div > div > div > img`	/maps/vt?pb=!1m5!1m4!1i4!2i3!3i5!4i256!2m3!1e0!2sm!3i7755...	15.7 KiB	5.1 KiB
div > div > div > img `div > div > div > img`	/maps/vt?pb=!1m5!1m4!1i4!2i4!3i5!4i256!2m3!1e0!2sm!3i7755...	15.2 KiB	4.5 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 266 ms

URL	Time Spent
united.com/	266 ms
www.united.com/	0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

Element	Layout shift score
Popular topics Search Wi-Fi Change flight United Club Traveling with pets Milea… `div.page > div.atm-c-provider__globalcss-allowed > div.relativePosition > footer`	0.104
Explore destinations Not sure where to go? Use our interactive map to find flig… `section.app-containers-InspirationBlock-inspirationBlock__inspirationBlock--Fws0r > div > div#mapPlacesWrapper > div.app-components-Places-styles__placesContainer--SGywk`	0.047
Explore destinations Not sure where to go? Use our interactive map to find flig… `section.app-containers-InspirationBlock-inspirationBlock__inspirationBlock--Fws0r > div > div#mapPlacesWrapper > div.app-components-Places-styles__placesContainer--SGywk`	0.047
Popular topics Search Wi-Fi Change flight United Club Traveling with pets Milea… `div.page > div.atm-c-provider__globalcss-allowed > div.relativePosition > footer`	0.012
Learn how to get rewarded with the United℠ Explorer Card `div.app-components-HomeTop-homeTop__ad--avLyf > div.app-components-HomeTop-homeTop__adPlacement--XWWYn > div.app-components-HomeTop-homeTop__adPlacementInner--akpfz > button.app-containers-Ad-ad__adContent--gAgPf`	0.003
Wi-Fi Change flight United Club Traveling with pets MileagePlus Baggage Refund … `footer > section.app-components-PopularFooter-styles__popularFooter--EoZYS > div.app-components-PopularFooter-styles__container--oYTlc > ul.atm-u-margin-none`	0.000
div#69caa2b3-7122-44ff-877b-d76a35202659 > div.atm-c-datepicker__input-container > span.atm-c-resizing-input_container > input#ReturnDate `div#69caa2b3-7122-44ff-877b-d76a35202659 > div.atm-c-datepicker__input-container > span.atm-c-resizing-input_container > input#ReturnDate`	0.000

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 970 ms 2.6 MiB

URL	Transfer Size	Est Savings
www.united.com/main.652a551221f08a6b2c8d.js	1.1 MiB	489.7 KiB
tags.tiqcdn.com/utag/unitedairlines/united-v3/prod/utag.js	405.7 KiB	347.8 KiB
www.united.com/5566.7b89798c7cee54d27513.js	857.9 KiB	345.3 KiB
cdn.optimizely.com/js/27764480084.js	233.4 KiB	182.6 KiB
/le_unified_window/10.47.0-release_2318786578/desktopEmbe...	264.3 KiB	182.3 KiB
cdn.optimizely.com/js/27764480084.js	233.4 KiB	152.0 KiB
/pagead/managed/js/adsense/m202604100101/show_ads_impl_fy...	177.6 KiB	128.6 KiB
/pagead/managed/js/gpt/m202604100101/pubads_impl.js?cb=31...	186.4 KiB	99.7 KiB
cdn.quantummetric.com/qscripts/quantum-united.js	258.8 KiB	91.2 KiB
cdn-prod.securiti.ai/consent/cookie-consent-sdk-latest.js	113.4 KiB	84.5 KiB
www.united.com/72620.d756b6273507471e3afb.chunk.js	110.6 KiB	69.1 KiB
www.united.com/65880.a937d4750aeb9e94108e.chunk.js	90.9 KiB	64.7 KiB
/lptag/api/account/84608747/configuration/applications/ta...	126.7 KiB	52.1 KiB
www.united.com/86183.c838589b9ae3afc69023.chunk.js	176.7 KiB	44.6 KiB
maps.googleapis.com/maps-api-v3/api/js/64/9c/main.js	82.8 KiB	39.1 KiB
c.amazon-adsystem.com/aax2/apstag.js	90.4 KiB	38.6 KiB
www.united.com/3mZEiYvQPZ/f--chewpqN/J9hihpaY1r3VS0VEOS/CzlpAQ/PC/ZKWzBDLQAC	175.5 KiB	36.7 KiB
www.united.com/47143.e5cf3124466f664d3f48.chunk.js	46.8 KiB	34.1 KiB
www.united.com/13292.1bd297fb4fcfa16106cf.chunk.js	45.6 KiB	31.8 KiB
/3mZEiYvQPZ/f--chewpqN/rQhihpaY1r3V/T3xxAQ/Yx/VdCwwjXSAOA...	154.3 KiB	31.6 KiB
/pagead/js/adsbygoogle.js?client=ca-pub-1222110720342108	54.2 KiB	28.5 KiB
/jstag/1786d8fd613/ruxitagent_A7NVfhqrux_1030525010714160...	73.8 KiB	25.9 KiB
maps.googleapis.com/maps-api-v3/api/js/64/9c/util.js	69.7 KiB	22.0 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
www.united.com/main.652a551221f08a6b2c8d.js	3.2 s	3.1 s	95 ms
www.united.com/	1.7 s	1.2 s	3.6 ms
www.united.com/public/5f38d84750bc89adb299679cfbd033a0e193ad07d445	1.3 s	1.1 s	4.7 ms
cdn.optimizely.com/js/27764480084.js	775 ms	693 ms	54 ms
Unattributable	685 ms	372 ms	0.0 ms
www.united.com/86183.c838589b9ae3afc69023.chunk.js	427 ms	359 ms	33 ms
/utag/unitedairlines/united-v3/prod/utag.145.js?utv=ut4.5...	201 ms	200 ms	0.2 ms
maps.googleapis.com/maps-api-v3/api/js/64/9c/controls.js	181 ms	147 ms	2.0 ms
/3mZEiYvQPZ/f--chewpqN/rQhihpaY1r3V/T3xxAQ/Yx/VdCwwjXSAOA...	176 ms	125 ms	25 ms
www.united.com/3mZEiYvQPZ/f--chewpqN/J9hihpaY1r3VS0VEOS/CzlpAQ/PC/ZKWzBDLQAC	158 ms	143 ms	9.9 ms
tags.tiqcdn.com/utag/unitedairlines/united-v3/prod/utag.js	152 ms	117 ms	33 ms
maps.googleapis.com/maps-api-v3/api/js/64/9c/map.js	141 ms	106 ms	1.6 ms
/pagead/managed/js/gpt/m202604100101/pubads_impl.js?cb=31...	130 ms	116 ms	12 ms
cdn.quantummetric.com/qscripts/quantum-united.js	108 ms	60 ms	28 ms
www.united.com/6580.c41fc5933cf6d4e27260.chunk.js	107 ms	83 ms	5.4 ms
/pagead/managed/js/adsense/m202604100101/show_ads_impl_fy...	81 ms	66 ms	10 ms
www.united.com/47143.e5cf3124466f664d3f48.chunk.js	72 ms	65 ms	7.0 ms
www.united.com/5566.7b89798c7cee54d27513.js	68 ms	1.7 ms	66 ms
www.united.com/74640.f61ba13fae29248d39a2.chunk.js	66 ms	60 ms	5.3 ms
/lptag/api/account/84608747/configuration/applications/ta...	63 ms	43 ms	11 ms
c.amazon-adsystem.com/aax2/apstag.js	61 ms	51 ms	8.6 ms
www.united.com/65897.c96bc1feb607ab4c2807.chunk.js	56 ms	38 ms	17 ms
maps.googleapis.com/maps-api-v3/api/js/64/9c/main.js	53 ms	42 ms	6.2 ms
maps.googleapis.com/maps-api-v3/api/js/64/9c/log.js	52 ms	46 ms	0.7 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	8.8 s
Script Parsing & Compilation	614 ms
Other	594 ms
Style & Layout	295 ms
Garbage Collection	215 ms
Rendering	88 ms
Parse HTML & CSS	20 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reason	Failure type
The page has an unload handler in the main frame.	Actionable
The page has an unload handler in a sub frame.	Actionable

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 324.8 KiB

URL	Transfer Size	Est Savings
.sdl-components .hide,.sdl-components .init-hidden,.sdl-c...	112.7 KiB	70.2 KiB
@charset "UTF-8";.acc__btn:after,.after-icon-favorite:after,.anchormenu__heading>.accordion__btn::a…	75.7 KiB	47.5 KiB
.atm-c-calendar--reset{padding:0;border:none;font:inherit;color:inherit; … } …	19.0 KiB	14.8 KiB
.atm-c-block-link .atm-c-block-link__container{display:grid;grid-template-columns:auto 1fr auto; … } …	16.1 KiB	12.5 KiB
.atm-c-alert-container{border-radius:10px} …	12.3 KiB	9.7 KiB
:root{--atm-c-tabs-arrow-background-color-left: linear-gradient(90deg, #ffffff 66.67%, rgba(255, 25…	12.4 KiB	9.7 KiB
.atm-c-btn{display:inline-flex;align-items:center;justify-content:center;padding-top:.75rem; … } …	11.5 KiB	9.0 KiB
.atm-c-legacy-wrapper a{font-size:inherit;text-transform:inherit} …	9.7 KiB	7.3 KiB
.PresetDateRangePicker_panel { padding: 0 22px 11px } …	10.1 KiB	7.2 KiB
.atm-c-matrix__container{position:relative;overflow-x:auto;overflow-y:hidden} …	8.8 KiB	6.9 KiB
.atm-c-flight-block{padding:1rem;border-radius:10px} …	8.0 KiB	6.3 KiB
.rdp-root{--rdp-accent-color: #0D0D8F;--rdp-accent-background-color: #DFE9FD;--rdp-day-height: 26px…	7.5 KiB	5.9 KiB
.atm-c-avatar{position:relative;background-color:rgba(0,0,0,0);padding:0;margin:0;display:flex; … } …	7.2 KiB	5.5 KiB
.atm-c-icard{position:relative;display:flex;flex-direction:column;align-items:center; … } …	7.0 KiB	5.5 KiB
.atm-c-accordion__details{display:grid;grid-template-rows:0fr; … } …	6.7 KiB	5.3 KiB
.atm-c-badge{display:inline-flex;align-items:center;padding-top:.25rem;padding-right:.75rem; … } …	6.7 KiB	5.2 KiB
.atm-c-price-graph{position:relative;border:1px solid #ccc;border-radius:10px; … } …	6.5 KiB	5.2 KiB
.atm-c-stepper_interactive{padding:1rem;border:1px solid #d7d7d4;background:#fff} …	6.5 KiB	5.1 KiB
.atm-c-datepicker{display:flex;flex-direction:column;width:100%} …	5.8 KiB	4.5 KiB
.atm-c-tags__tag_container{display:flex;flex-direction:row;border-radius:100px; … } …	5.8 KiB	4.5 KiB
.atm-c-table{border-collapse:collapse;border-spacing:0;width:100%;margin-bottom:1rem; … } …	5.7 KiB	4.5 KiB
.atm-c-toggle-field{display:block;margin:0;padding:0;border:none} …	5.6 KiB	4.4 KiB
*{box-sizing:border-box} …	6.8 KiB	4.4 KiB
.atm-c-stepper{background:#fff;border-radius:10px;border:1px solid #d7d7d4;margin-bottom:2rem; … } …	4.9 KiB	3.9 KiB
.atm-c-base-autocomplete{position:relative} …	4.8 KiB	3.8 KiB
.atm-c-leftnav-chapter__list{list-style:none;margin:0;padding:0;width:100%} …	4.7 KiB	3.7 KiB
/* Document * ========================================================================== / /* …	4.0 KiB	3.6 KiB
.atm-c-box-button{display:flex;flex-direction:column;align-items:center;justify-content:center; … } …	4.4 KiB	3.5 KiB
.atm-c-modal{display:flex;align-items:center;justify-content:center;visibility:hidden;width:100%; … } …	4.1 KiB	3.3 KiB
.atm-c-number-label{display:flex;width:2rem;height:2rem;padding:.5rem;align-items:center; … } …	4.2 KiB	3.3 KiB
.atm-c-horizontal-link-list{display:flex;flex-wrap:wrap;padding-left:0;list-style:none} …	4.2 KiB	3.2 KiB
.atm-c-toggle-checkbox-field{display:block;margin:0;padding:0;border:none} …	4.0 KiB	3.1 KiB
.atm-l-grid{display:flex;flex-wrap:wrap;margin:-0.75rem} …	3.7 KiB	3.0 KiB
.atm-c-textarea{font-size:1rem;font-weight:400;line-height:1.5; … } …	3.6 KiB	2.9 KiB
.atm-c-slider{margin:0;-webkit-appearance:none;appearance:none;width:100%;height:7px; … } …	3.6 KiB	2.8 KiB
.atm-c-textarea-field{margin-bottom:2rem;position:relative;padding-top:.75rem} …	3.6 KiB	2.8 KiB
.atm-c-link-list{margin:0;padding:0;list-style:none;font-size:1rem;font-weight:400;line-height:1.5; … } …	3.5 KiB	2.7 KiB
.atm-c-heading{margin:0;padding:0} …	3.2 KiB	2.5 KiB
.atm-c-gallery{top:0;left:0;position:absolute;width:100%;height:100%;display:flex; … } …	3.1 KiB	2.5 KiB
.atm-c-switch{display:flex;align-items:center} …	3.0 KiB	2.4 KiB
.atm-c-counter__body{display:flex;max-width:10rem} …	2.9 KiB	2.2 KiB
.atm-c-textfield{position:relative} …	2.8 KiB	2.2 KiB
.atm-c-slim-offer{border:1px solid #ccc;border-radius:10px;display:grid; … } …	2.7 KiB	2.1 KiB
.atm-c-feature{display:flex;flex-direction:column;align-items:stretch; … } …	2.6 KiB	2.1 KiB
.atm-c-text-passage p{margin-bottom:1.5rem} …	2.6 KiB	2.1 KiB

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 70.7 KiB

URL	Transfer Size	Est Savings
cdn.optimizely.com/js/27764480084.js	233.8 KiB	35.3 KiB
cdn.optimizely.com/js/27764480084.js	233.8 KiB	35.3 KiB

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 281.6 KiB

URL	Transfer Size	Est Savings
.sdl-components .hide,.sdl-components .init-hidden,.sdl-c...	112.7 KiB	112.7 KiB
@charset "UTF-8";.acc__btn:after,.after-icon-favorite:after,.anchormenu__heading>.accordion__btn::a…	75.7 KiB	75.7 KiB
.atm-c-calendar--reset{padding:0;border:none;font:inherit;color:inherit; … } …	19.0 KiB	19.0 KiB
.atm-c-block-link .atm-c-block-link__container{display:grid;grid-template-columns:auto 1fr auto; … } …	16.1 KiB	16.1 KiB
.app-components-RightPanelComponent-rightPanelComponent__btnDefault--jjNb_{text-align:center; … } …	12.7 KiB	12.7 KiB
:root{--atm-c-tabs-arrow-background-color-left: linear-gradient(90deg, #ffffff 66.67%, rgba(255, 25…	12.4 KiB	12.2 KiB
.atm-c-alert-container{border-radius:10px} …	12.3 KiB	12.1 KiB
.atm-c-btn{display:inline-flex;align-items:center;justify-content:center;padding-top:.75rem; … } …	11.5 KiB	10.9 KiB
.PresetDateRangePicker_panel { padding: 0 22px 11px } …	10.1 KiB	10.1 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
www.united.com/main.652a551221f08a6b2c8d.js	1.1 MiB
www.united.com/5566.7b89798c7cee54d27513.js	858.4 KiB
www.united.com/e12cc94d54b308001cb2.placeholder_desktop.webp	429.9 KiB
tags.tiqcdn.com/utag/unitedairlines/united-v3/prod/utag.js	406.1 KiB
www.united.com/de03c2916e8b84cccdb6.u100-DesktopWeb.webp	318.6 KiB
/le_unified_window/10.47.0-release_2318786578/desktopEmbe...	264.7 KiB
cdn.quantummetric.com/qscripts/quantum-united.js	259.4 KiB
apps.rokt.com/wsdk/plugins/widget/modern/index.bc13226619f0851fb148.js	252.7 KiB
cdn.optimizely.com/js/27764480084.js	234.4 KiB
/pagead/managed/js/gpt/m202604100101/pubads_impl.js?cb=31...	186.4 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
Learn how to get rewarded with the United℠ Explorer Card `div.app-components-HomeTop-homeTop__adPlacement--XWWYn > div.app-components-HomeTop-homeTop__adPlacementInner--akpfz > button.app-containers-Ad-ad__adContent--gAgPf > img.app-containers-Ad-ad__heroLayout--QTd6I`	www.united.com/6f949b1423b88620db51.chaseDefault_error.webp
United logo link to homepage `div.app-components-GlobalFooter-FooterBottom-styles__disclaimerLogos--hHQXB > div.app-components-GlobalFooter-FooterBottom-styles__displayFlex--Yg3OU > a.atm-c-text-link > img`	www.united.com/3149651732b3c9591453.UnitedLogoInverted.svg
United logo link to homepage `div.app-components-GlobalHeader-styles__navbarContainer--G88_N > div.app-components-GlobalHeader-Logo-styles__headerLogoContainer--Jg3Fs > a#unitedLogo > img`	www.united.com/2500e4e62233fbfe8ac6.unitedLogoNew.svg
United is a proud member of Star Alliance `div.app-components-GlobalFooter-FooterBottom-styles__disclaimerLogos--hHQXB > div.app-components-GlobalFooter-FooterBottom-styles__displayFlex--Yg3OU > a.atm-c-text-link > img`	www.united.com/dd45368f41b2bc6e1df9.StarAlliance.svg
div.app-components-HomeTop-homeTop__adPlacementInner--akpfz > button.app-containers-Ad-ad__adContent--gAgPf > span.app-containers-Ad-ad__externalLink--ePS_G > img `div.app-components-HomeTop-homeTop__adPlacementInner--akpfz > button.app-containers-Ad-ad__adContent--gAgPf > span.app-containers-Ad-ad__externalLink--ePS_G > img`	www.united.com/e2b54c9039e6f164486e.external-link-white.svg

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Optimize DOM size

●Forced reflow

●Modern HTTP

●Optimize viewport for mobile

●User Timing marks and measures 8 user timings

●Avoid long main-thread tasks 20 long tasks found

●Avoid non-composited animations 10 animated elements found

●Network Requests

●Network Round Trip Times 100 ms

●Server Backend Latencies 180 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 100 ms

○INP breakdown

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Click to choose the maximum price using a slider `div.atm-c-textfield__body > div.atm-c-popupmodal > div.atm-c-textfield__btn-container > button.atm-c-btn`

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Check-in `div.app-components-BookTravel-bookTravel__travelNavContainer--uiTe0 > div > div.app-components-BookTravel-bookTravel__travelNav--Qo_b2 > button#checkInTab`
My trips `div.app-components-BookTravel-bookTravel__travelNavContainer--uiTe0 > div > div.app-components-BookTravel-bookTravel__travelNav--Qo_b2 > button#tripsTab`
Packages `div.app-components-BookFlight-bookFlight__tabListWrapper--FfCv9 > div.app-components-BookFlight-bookFlight__tabListContainer--Cy54f > div.app-components-BookFlight-bookFlight__bookFlightMenu--XR5Ar > button#bookPackageTab`
Flexible dates Use the arrow keys to navigate between days and weeks. Use page… `div > div.non-atmos-datepicker > div.app-components-Calendar-ButtonCalendar-styles__calendarButtonContainer--WbWQV > button.app-components-Calendar-ButtonCalendar-styles__calendarButton--a4qLk`
English - United States $ `div.app-components-GlobalFooter-FooterBottom-styles__showDesktop--vVFGl > div > div.app-components-Popover-popover__wrapper--xge6G > button.atm-c-btn`

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

●`[role]`s are contained by their required parent element

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●Input buttons have discernible text.

●Form elements have associated labels

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●Select elements have associated label elements.

●`button`, `link`, and `menuitem` elements have accessible names

●ARIA attributes are used as specified for the element's role

●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Elements use only permitted ARIA attributes

●ARIA `tooltip` elements have accessible names

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links are distinguishable without relying on color.

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Uses ARIA roles only on compatible elements

●Identical links have the same purpose.

○`[accesskey]` values are unique

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○`<input type="image">` elements have `[alt]` text

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Image elements do not have `[alt]` attributes that are redundant text.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / Warning	Source
Unload event listeners are deprecated and will be removed.	www.united.com/public/5f38d84750bc89adb299679cfbd033a0e193ad07d445 line 121, col 127

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

Source	Description
	`An unknown error occurred when fetching the script.`
www.united.com/api/CCEProducts/GetCCEContent	`Failed to load resource: the server responded with a status of 428 ()`
www.united.com/api/Home/HeroCarouselbyCCE	`Failed to load resource: the server responded with a status of 428 ()`
www.united.com/api/CCEProducts/GetCCEContent	`Failed to load resource: the server responded with a status of 428 ()`
di.rlcdn.com/api/segment?pid=713482	`Failed to load resource: the server responded with a status of 451 ()`
www.united.com/public/5f38d84750bc89adb299679cfbd033a0e193ad07d445 line 40, col 296	`TypeError: Failed to register a ServiceWorker for scope ('https://www.united.com/') with script ('https://www.united.com/sw.js'): An unknown error occurred when fetching the script.`

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Map URL
www.united.com/main.652a551221f08a6b2c8d.js
www.united.com/86183.c838589b9ae3afc69023.chunk.js
www.united.com/72620.d756b6273507471e3afb.chunk.js
www.united.com/65897.c96bc1feb607ab4c2807.chunk.js
www.united.com/5566.7b89798c7cee54d27513.js
www.united.com/3mZEiYvQPZ/f--chewpqN/J9hihpaY1r3VS0VEOS/CzlpAQ/PC/ZKWzBDLQAC
apps.rokt.com/wsdk/integrations/launcher.js	sourcemaps-wsdk.roktinternal.com/integrations/launcher.2.9534.0.js.map

●Uses HTTPS

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Crawling and Indexing

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.

Why this matters

Performance issues directly impact user engagement and conversion rates.

To appear in search results, crawlers need access to your app.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`