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

Audit breakdown by category with detailed findings.

32

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.

RequestCache TTLTransfer Size
/digitalhangar/design-system/releases/v1.26.2/standalone/...300.0 s308.0 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/2d7ed8d4.chunk.js21600.0 s344.9 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/d77d313a.chunk.js21600.0 s263.3 KiB
tags.tiqcdn.com/utag/lufthansa/main/prod/utag.js300.0 s119.9 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/cd23e20a.chunk.js21600.0 s166.7 KiB
/digitalhangar/design-system/releases/v1.26.2/standalone/...300.0 s86.0 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/cf6255a2.chunk.js21600.0 s117.6 KiB
/digitalhangar/design-system/releases/v1.26.2/standalone/...300.0 s62.9 KiB
/digitalhangar/design-system/releases/v1.26.2/standalone/...300.0 s62.9 KiB
/digitalhangar/design-system/releases/v1.26.2/standalone/...300.0 s62.7 KiB
/digitalhangar/design-system/releases/v1.26.2/standalone/...300.0 s61.2 KiB
/digitalhangar/design-system/releases/v1.26.2/standalone/...300.0 s59.8 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/5d46fbc4.chunk.js21600.0 s85.1 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/a9b5e927.chunk.js21600.0 s83.7 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/63ac1397.chunk.js21600.0 s73.8 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/9962a698.chunk.js21600.0 s73.7 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/9792a05f.chunk.js21600.0 s66.1 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/d10bccbc.chunk.js21600.0 s52.3 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/6ca9e8b0.chunk.js21600.0 s45.5 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/a2a91b3a.chunk.js21600.0 s43.8 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/css/index.vea0vnMZ.css21600.0 s36.5 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/c7781604.chunk.js21600.0 s33.5 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/1eb3402f.chunk.js21600.0 s31.5 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/d247fd2e.chunk.js21600.0 s19.4 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/d12c3f7c.chunk.js21600.0 s17.0 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/c2aa5e96.chunk.js21600.0 s14.0 KiB
/cdn-cgi/challenge-platform/h/b/scripts/jsd/625261456364/...14400.0 s13.0 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/695c08d9.chunk.js21600.0 s13.4 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/862e1e92.chunk.js21600.0 s13.1 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/7cc406b1.chunk.js21600.0 s13.1 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/bfba4587.chunk.js21600.0 s12.5 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/27adff7c.chunk.js21600.0 s11.1 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/91670098.chunk.js21600.0 s9.6 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/10ebc504.chunk.js21600.0 s8.9 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/757d7063.chunk.js21600.0 s7.9 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/11aa9c19.chunk.js21600.0 s7.9 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/d65aed18.chunk.js21600.0 s7.8 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/69d64245.chunk.js21600.0 s7.3 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/a09ab768.chunk.js21600.0 s6.2 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/926d8c4c.chunk.js21600.0 s5.6 KiB
/digitalhangar/design-system/releases/v1.26.2/standalone/...300.0 s3.7 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/d1f1980a.chunk.js21600.0 s5.1 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/d53add62.chunk.js21600.0 s5.1 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/87d262ac.chunk.js21600.0 s5.1 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/b8d9fe1c.chunk.js21600.0 s4.6 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/60f1653c.chunk.js21600.0 s4.3 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/9a2b9d87.chunk.js21600.0 s4.1 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/22bae939.chunk.js21600.0 s4.0 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/f14c36cb.chunk.js21600.0 s3.7 KiB
rum.hlx.page/.rum/@adobe/helix-rum-js@%5E2/dist/rum-standalone.js3600.0 s2.8 KiB
tags.tiqcdn.com/utag/tiqapp/utag.currency.js?utv=ut4.46.20260407194301300.0 s2.1 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/9c3d2df9.chunk.js21600.0 s3.1 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/05ebee29.chunk.js21600.0 s2.8 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/dda45a06.chunk.js21600.0 s2.7 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/60dd67cc.chunk.js21600.0 s1.9 KiB
/utag/tiqapp/utag.v.js?a=lufthansa/main/202604020439&cb=1...300.0 s430 B
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/63fbb14f.chunk.js21600.0 s625 B
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/23e022a6.chunk.js21600.0 s476 B
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/48fe4624.chunk.js21600.0 s196 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:0.010321] map[node:map[boundingRect:map[bottom:1121 height:324 left:88 right:1247 top:796 width:1159] lhId:page-16-DIV nodeLabel:Discover the world with Lufthansa Allegris New premium entry Light options in P… path:1,HTML,1,BODY,3,DIV,5,DIV,0,DIV,0,DIV,5,DIV selector:div.contentpage > div.content-wrapper > div.container-content > div.twocolumn snippet:<div class="twocolumn column event"> type:node] score:0.009315 subItems:map[items:[map[cause:Unsized image element]] type:subitems]] map[node:map[boundingRect:map[bottom:99 height:77 left:536 right:1262 top:22 width:726] lhId:page-14-DIV nodeLabel:Login & Registration Country and language selection which opens a new modal; cu… path:1,HTML,1,BODY,3,DIV,3,HEADER,1,DIV,1,DIV,1,DIV selector:header#header > div.common-header > div.common-header-wrapper > div.common-header-nav-wrap snippet:<div class="common-header-nav-wrap"> type:node] score:0.001006]]
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:0.13448399999999996] map[node:map[boundingRect:map[bottom:698 height:214 left:88 right:1247 top:484 width:1159] lhId:page-20-DIV nodeLabel:Flights Rental Car Hotel Type of trip Round trip Round trip Adjust passenger an… path:1,HTML,1,BODY,3,DIV,5,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,2,DIV selector:div.redesignedflightmanager > div.dcep-flight-manager > div#flightmanager-container-a0c01f66e-d989-40df-9636-205cb16d5a14 > div#flm-scroller-anchor-a0c01f66e-d989-40df-9636-205cb16d5a14 snippet:<div id="flm-scroller-anchor-a0c01f66e-d989-40df-9636-205cb16d5a14" class="pt-overlay flm-overlay"> type:node] score:0.090569] map[node:map[boundingRect:map[bottom:1121 height:324 left:88 right:1247 top:796 width:1159] lhId:page-16-DIV nodeLabel:Discover the world with Lufthansa Allegris New premium entry Light options in P… path:1,HTML,1,BODY,3,DIV,5,DIV,0,DIV,0,DIV,5,DIV selector:div.contentpage > div.content-wrapper > div.container-content > div.twocolumn snippet:<div class="twocolumn column event"> type:node] score:0.032207] map[node:map[boundingRect:map[bottom:120 height:120 left:0 right:1350 top:0 width:1350] lhId:page-18-HEADER nodeLabel:Lufthansa Login & Registration Country and language selection which opens a new… path:1,HTML,1,BODY,3,DIV,3,HEADER selector:body.maui-theme-lh > div.contentpage-wrapper > header#header snippet:<header id="header" class="core-header-wrap container-brand common-header-wrap-to-top"> type:node] score:0.009371] map[node:map[boundingRect:map[bottom:99 height:77 left:536 right:1262 top:22 width:726] lhId:page-14-DIV nodeLabel:Login & Registration Country and language selection which opens a new modal; cu… path:1,HTML,1,BODY,3,DIV,3,HEADER,1,DIV,1,DIV,1,DIV selector:header#header > div.common-header > div.common-header-wrapper > div.common-header-nav-wrap snippet:<div class="common-header-nav-wrap"> type:node] score:0.001025] map[node:map[boundingRect:map[bottom:120 height:120 left:0 right:1350 top:0 width:1350] lhId:page-18-HEADER nodeLabel:Lufthansa Login & Registration Country and language selection which opens a new… path:1,HTML,1,BODY,3,DIV,3,HEADER selector:body.maui-theme-lh > div.contentpage-wrapper > header#header snippet:<header id="header" class="core-header-wrap container-brand common-header-wrap-to-top"> type:node] score:0.000798]]

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.

URLEst Savings
/digitalhangar/design-system/releases/v1.26.2/standalone/...50 ms
/digitalhangar/design-system/releases/v1.26.2/standalone/...45 ms
/digitalhangar/design-system/releases/v1.26.2/standalone/...40 ms
/digitalhangar/design-system/releases/v1.26.2/standalone/...25 ms
/digitalhangar/design-system/releases/v1.26.2/standalone/...25 ms

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:3.806 source:map[column:19 line:3610 type:source-location url:https://www.lufthansa.com/etc.clientlibs/clientlibs/granite/jquery.1fc733054ddb2e2fcd4a0f763671047b.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:83.657 source:map[type:text value:[unattributed]]] map[reflowTime:28.423 source:map[column:14 line:67323 type:source-location url:https://www.lufthansa.com/digitalhangar/design-system/releases/v1.26.2/standalone/packages/maui-design-system.js urlProvider:network]] map[reflowTime:21.714 source:map[column:16 line:67708 type:source-location url:https://www.lufthansa.com/digitalhangar/design-system/releases/v1.26.2/standalone/packages/maui-design-system.js urlProvider:network]] map[reflowTime:6.918 source:map[column:23 line:67410 type:source-location url:https://www.lufthansa.com/digitalhangar/design-system/releases/v1.26.2/standalone/packages/maui-design-system.js urlProvider:network]] map[reflowTime:3.806 source:map[column:45 line:3733 type:source-location url:https://www.lufthansa.com/etc.clientlibs/clientlibs/granite/jquery.1fc733054ddb2e2fcd4a0f763671047b.js urlProvider:network]] map[reflowTime:2.069 source:map[column:171 line:0 type:source-location url: urlProvider:network]] map[reflowTime:3.818 source:map[column:3422 line:0 type:source-location url: urlProvider:network]] map[reflowTime:0.97 source:map[column:3367 line:3 type:source-location url:https://www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/app.07da5691.js urlProvider:network]]]

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.

URLResource SizeEst Savings
div.moving-image > div.w-100 > figure > img.w-100 div.moving-image > div.w-100 > figure > img.w-100
www.lufthansa.com/content/dam/lh/documents/LHH_Griechenland%202.jpg10.2 MiB10.0 MiB
div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img
/content/dam/lh/images/offers/fareteaserdynamic/Destinati...164.4 KiB146.5 KiB
Lufthansa in the US div.teaser > a.teaser > div.image-wrapper > img
/content/dam/lh/images/pixels_variations/c-293302233-1738...97.0 KiB93.6 KiB
div.teaser > a.teaser > div.image-wrapper > img div.teaser > a.teaser > div.image-wrapper > img
/content/dam/lh/images/local_variations/c-997670840-015-P...94.9 KiB91.5 KiB
USA, Los Angeles: P&radic;&sect;rchen beim Sonnenuntergang unterwegs im Cabrio.… div.teaser > a.teaser > div.image-wrapper > img
/content/dam/lh/de/images/frontify_variations/2/c-1565599...90.7 KiB87.4 KiB
Lufthansa student product div.teaser > a.teaser > div.image-wrapper > img
/content/dam/lh/images/local_variations/c-1317346499-genf...92.4 KiB87.2 KiB
Ein Mann sitzt relaxed in der Premium Economy Class // A man sits relaxed in Pr… div.moving-image > div.w-100 > figure > img.w-100
/content/dam/lh/images/frontify_variations/5/c-1717148228...84.7 KiB71.4 KiB
div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img
/content/dam/lh/images/offers/destination/bud-square.jpg....38.9 KiB21.0 KiB
div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img
/content/dam/lh/images/offers/destination/ath-square.jpg....35.7 KiB17.8 KiB
div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img
/content/dam/lh/images/offers/destination/rom-square.jpg....35.7 KiB17.8 KiB
div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img
/content/dam/lh/images/offers/destination/muc-square.jpg....35.6 KiB17.7 KiB
div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img
/content/dam/lh/images/offers/destination/zrh-square.jpg....29.8 KiB11.9 KiB
div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img
/content/dam/lh/images/offers/destination/vie-square.jpg....28.3 KiB10.4 KiB
div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img div.fareteaser-recommendation-image > div.image-wrapper > maui-image > img
/content/dam/lh/images/offers/destination/fra-square.jpg....26.0 KiB8.1 KiB

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:182.612 label:Time to first byte subpart:timeToFirstByte] map[duration:2280.341 label:Resource load delay subpart:resourceLoadDelay] map[duration:683.3719999961853 label:Resource load duration subpart:resourceLoadDuration] map[duration:558.8420000038147 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-IMG
nodeLabel: div.moving-image > div.w-100 > figure > img.w-100
path: 1,HTML,1,BODY,3,DIV,5,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,FIGURE,0,IMG
selector: div.moving-image > div.w-100 > figure > img.w-100
snippet: <img src="/content/dam/lh/documents/LHH_Griechenland 2.jpg" srcset="/content/dam/lh/documents/LHH_Griechenland 2.jpg.transform/lh-dcep-transfo…" alt="" class="w-100 h-100 object-cover">

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-IMG
nodeLabel: div.moving-image > div.w-100 > figure > img.w-100
path: 1,HTML,1,BODY,3,DIV,5,DIV,0,DIV,0,DIV,1,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,FIGURE,0,IMG
selector: div.moving-image > div.w-100 > figure > img.w-100
snippet: <img src="/content/dam/lh/documents/LHH_Griechenland 2.jpg" srcset="/content/dam/lh/documents/LHH_Griechenland 2.jpg.transform/lh-dcep-transfo…" alt="" class="w-100 h-100 object-cover">

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.

URLTransfer SizeDuration
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/css/index.vea0vnMZ.css36.5 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/css/app.3a299fb6.css119.5 KiB120 ms
/digitalhangar/design-system/releases/v1.26.2/standalone/...3.7 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: 252 ms
URLTime Spent
www.lufthansa.com/252 ms
www.lufthansa.com/us/en/homepage0.0 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.

ElementLayout shift score
Flights Rental Car Hotel Type of trip Round trip Round trip Adjust passenger an… div.redesignedflightmanager > div.dcep-flight-manager > div#flightmanager-container-a0c01f66e-d989-40df-9636-205cb16d5a14 > div#flm-scroller-anchor-a0c01f66e-d989-40df-9636-205cb16d5a14
0.091
Discover the world with Lufthansa Allegris New premium entry Light options in P… div.contentpage > div.content-wrapper > div.container-content > div.twocolumn
0.032
Lufthansa Login & Registration Country and language selection which opens a new… body.maui-theme-lh > div.contentpage-wrapper > header#header
0.009
Discover the world with Lufthansa Allegris New premium entry Light options in P… div.contentpage > div.content-wrapper > div.container-content > div.twocolumn
0.009
Login & Registration Country and language selection which opens a new modal; cu… header#header > div.common-header > div.common-header-wrapper > div.common-header-nav-wrap
0.001
Login & Registration Country and language selection which opens a new modal; cu… header#header > div.common-header > div.common-header-wrapper > div.common-header-nav-wrap
0.001
Lufthansa Login & Registration Country and language selection which opens a new… body.maui-theme-lh > div.contentpage-wrapper > header#header
0.001
Login & Registration div.common-header-wrapper > div.common-header-nav-wrap > div.common-header-meta-links > div.top-link
0.000
Login & Registration Country and language selection which opens a new modal; cu… header#header > div.common-header > div.common-header-wrapper > div.common-header-nav-wrap
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

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: 120 ms 125.1 KiB
URLTransfer SizeEst Savings
/digitalhangar/design-system/releases/v1.26.2/standalone/...307.8 KiB75.0 KiB
/etc.clientlibs/clientlibs/granite/jquery.1fc733054ddb2e2...86.6 KiB42.1 KiB
/etc.clientlibs/clientlibs/granite/utils.a21d361818b30206...10.6 KiB8.0 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 147.6 KiB
URLTransfer SizeEst Savings
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/css/app.3a299fb6.css119.3 KiB113.7 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/css/index.vea0vnMZ.css36.4 KiB33.8 KiB

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: 650 ms 852.2 KiB
URLTransfer SizeEst Savings
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/2d7ed8d4.chunk.js343.3 KiB167.3 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/cd23e20a.chunk.js166.6 KiB150.0 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/d77d313a.chunk.js261.6 KiB133.8 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/cf6255a2.chunk.js117.5 KiB76.2 KiB
/etc.clientlibs/clientlibs/granite/jquery.1fc733054ddb2e2...86.6 KiB57.3 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/63ac1397.chunk.js73.7 KiB45.2 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/d10bccbc.chunk.js52.1 KiB45.0 KiB
/digitalhangar/design-system/releases/v1.26.2/standalone/...307.8 KiB42.5 KiB
tags.tiqcdn.com/utag/lufthansa/main/prod/utag.js116.8 KiB39.2 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/9792a05f.chunk.js66.0 KiB33.7 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/9962a698.chunk.js73.5 KiB33.0 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/5d46fbc4.chunk.js84.1 KiB29.3 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.

URLTotal CPU TimeScript EvaluationScript Parse
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/2d7ed8d4.chunk.js1.9 s1.8 s1.6 ms
/digitalhangar/design-system/releases/v1.26.2/standalone/...1000 ms820 ms4.3 ms
Unattributable887 ms65 ms0.0 ms
www.lufthansa.com/us/en/homepage523 ms20 ms3.9 ms
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/63ac1397.chunk.js243 ms17 ms0.4 ms
shop.lufthansa.com/booking/api/prefetch140 ms117 ms1.5 ms
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/app.07da5691.js89 ms86 ms0.1 ms
/etc.clientlibs/clientlibs/granite/jquery/granite.ed0d934...87 ms83 ms1.4 ms
www.lufthansa.com/cdn-cgi/challenge-platform/scripts/jsd/main.js79 ms76 ms0.9 ms
tags.tiqcdn.com/utag/lufthansa/main/prod/utag.js61 ms36 ms17 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.

CategoryTime Spent
Script Evaluation3.2 s
Other1.3 s
Style & Layout421 ms
Rendering131 ms
Parse HTML & CSS84 ms
Garbage Collection74 ms
Script Parsing & Compilation54 ms

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.

URLTransfer Size
www.lufthansa.com/content/dam/lh/documents/LHH_Griechenland%202.jpg10.2 MiB
/statics/applications/booking/dist/28.4.0/main.4ade5f225e...1.2 MiB
shop.lufthansa.com/statics/applications/booking/dist/28.4.0/design-system.css543.3 KiB
/statics/applications/booking/dist/28.4.0/styles.c6cb0c68...504.6 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/2d7ed8d4.chunk.js344.9 KiB
/digitalhangar/design-system/releases/v1.26.2/standalone/...308.0 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/d77d313a.chunk.js263.3 KiB
/statics/applications/booking/dist/28.4.0/5817.788550406a...262.9 KiB
/statics/applications/booking/dist/28.4.0/Icons-v2.6bfc7c...167.2 KiB
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/cd23e20a.chunk.js166.7 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
Lufthansa Allegris div.moving-image > div.w-100 > figure > img.w-100
/content/dam/lh/images/allegris/241119_LH_Allegris_Lounge...
Ein Mann sitzt relaxed in der Premium Economy Class // A man sits relaxed in Pr… div.moving-image > div.w-100 > figure > img.w-100
/content/dam/lh/images/frontify_variations/5/c-1717148228...
div.teaser > a.teaser > div.image-wrapper > img div.teaser > a.teaser > div.image-wrapper > img
/content/dam/lh/images/local_variations/c-997670840-015-P...
Lufthansa student product div.teaser > a.teaser > div.image-wrapper > img
/content/dam/lh/images/local_variations/c-1317346499-genf...
USA, Los Angeles: P&radic;&sect;rchen beim Sonnenuntergang unterwegs im Cabrio.… div.teaser > a.teaser > div.image-wrapper > img
/content/dam/lh/de/images/frontify_variations/2/c-1565599...
Lufthansa in the US div.teaser > a.teaser > div.image-wrapper > img
/content/dam/lh/images/pixels_variations/c-293302233-1738...

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

●Optimize DOM size
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Avoid long main-thread tasks 12 long tasks found
●Avoid non-composited animations 1 animated element found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 0 ms
●Server Backend Latencies 240 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 30 ms
○INP breakdown
○User Timing marks and measures
86

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.

ARIA

Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid values. Learn more about valid values for ARIA attributes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#cm-consentDesc > div.checkBoxOption > label#ck_4_label > span#checkmark_ck_4 div#cm-consentDesc > div.checkBoxOption > label#ck_4_label > span#checkmark_ck_4

ARIA dialog elements without accessible names may prevent screen readers users from discerning the purpose of these elements. Learn how to make ARIA dialog elements more accessible.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
Privacy settings We use cookies and similar technologies that are necessary to… body.maui-theme-lh > div#__tealiumGDPRcpPrefs > div#cm-dial-v211

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Payment options div.col-md-6 > div.imagelinklist > div.link-list > h4.headline

These are opportunities to improve keyboard navigation in your application.

Names and labels

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
a.link a.link
a.link a.link

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Book & Prepare My bookings Discover Lufthansa 100 Years Lufthansa div.common-header-nav-wrap > div#nav > nav.header-navigation > ul

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

○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 are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●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.
●`button`, `link`, and `menuitem` elements have accessible names
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Elements with the `role=text` attribute do not have focusable descendents.
●ARIA toggle fields 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
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○ARIA `tooltip` elements 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
○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 buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○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.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○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.
77

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 / WarningSource
SharedStorage
www.lufthansa.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.
www.lufthansa.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge
www.lufthansa.com/cdn-cgi/challenge-platform/scripts/jsd/main.js

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.

SourceDescription
api.travelid.lufthansa.com/v1/user/me/loginstatus
Failed to load resource: the server responded with a status of 401 ()

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
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/d77d313a.chunk.js
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/cd23e20a.chunk.js
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/a9b5e927.chunk.js
www.lufthansa.com/etc/designs/dcep/clientlib-all/vite/js/2d7ed8d4.chunk.js
/digitalhangar/design-system/releases/v1.26.2/standalone/...
●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
100

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.

○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
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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