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https://finnair.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
58
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

3.26 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

3.67 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

1.15 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

4.26 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

13.08 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
8 PASS 2 REVIEW 5 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.8 MiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4451ms total JS execution
FIX
4451ms total JS execution
Warning::
Unattributable: 1048ms CPU time
Warning::
https://cdn.finnair.com/finnair-com-ux/lambda/prod...: 985ms CPU time
Warning::
https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii...: 916ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-5JS...: 390ms CPU time
Warning::
https://cdn.finnair.com/finnair-com-ux/lambda/prod...: 389ms CPU time
Warning::
Third-party scripts: 4451ms (100% of total)

Main Thread Breakdown

Script Evaluation 65% Other 22% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
Unattributable1048ms155ms0ms3rd
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/polyfills-QJ4JGQLQ.js985ms909ms0ms3rd
https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMB916ms795ms107ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5JS398390ms273ms68ms3rd
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-2DJMQKAI.js389ms348ms9ms3rd
https://www.finnair.com/akam/13/a2ab284184ms175ms5ms3rd
https://www.finnair.com/180ms17ms6ms3rd
https://cdn.c360a.salesforce.com/beacon/c360a/db5e18f4-83ad-4c55-81d1-9c17648c979c/scripts/c360a.min.js160ms114ms44ms3rd
https://s2.go-mpulse.net/boomerang/XCX6X-XLZQY-Y3L59-HYTY9-PFQT8125ms54ms71ms3rd
https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/XV9O/cVhbAQ/Qx9/wSwcVQw0q75ms65ms8ms3rd
F
JS Bundles
Action
29 scripts, 709 KB unused
FIX
29 scripts, 709 KB unused
Warning::
https://cdn.finnair.com/finnair-com-ux/lambda/prod...: 198 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.finnair.com/finnair-com-ux/lambda/prod...: 119 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.finnair.com/finnair-com-ux/lambda/prod...: 101 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.c360a.salesforce.com/beacon/c360a/db5e...: 77 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-5JS...: 77 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 709 KB
709 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-2DJMQKAI.js428 KB198 KB (46%)✓3rd
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-O4O3PMEK.js169 KB119 KB (70%)✓3rd
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-WPU7L22M.js162 KB101 KB (62%)✓3rd
https://cdn.c360a.salesforce.com/beacon/c360a/db5e18f4-83ad-4c55-81d1-9c17648c979c/scripts/c360a.min.js110 KB77 KB (70%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5JS398173 KB77 KB (44%)✓3rd
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-R2CCB6LO.js99 KB65 KB (65%)✓3rd
https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMB182 KB37 KB (21%)✓3rd
https://s2.go-mpulse.net/boomerang/XCX6X-XLZQY-Y3L59-HYTY9-PFQT856 KB36 KB (65%)✓3rd
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-RHXIJYDA.js0 KB—✓3rd
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-FIZJXGY6.js9 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
Page Weight Inventory
Action
57 resources · 1.8 MB · 709 KB savings available
FIX
57 resources · 1.8 MB · 709 KB savings available
Warning::
Page weight 834 KB over 1MB target
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~709 KB of savings available
Warning::
56 third-party resources (100% of weight)
Info::
1 resources over 200KB
57 resources · 1.8 MiB · 56 third-party 834.4 KiB over 1MB target
JavaScript 82% · 1.5 MiB
Font 7% · 131.7 KiB
Other 5% · 99.9 KiB
Image 3% · 63.1 KiB
Document 1% · 20.0 KiB
CSS 1% · 15.9 KiB

~708.8 KiB of savings available

Remove unused JavaScript: 708.8 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Page Weight Budget
Action
1.8 MB transferred, 57 requests
REVIEW
1.8 MB transferred, 57 requests
Info::
Page weighs 6.2 MB (1.8 MB transferred)
Warning::
JavaScript is 1.5 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.5 MB
Info::
57 HTTP requests
Info::
Estimated 0.38 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
57 requests
0.38 g CO2 per page load
JavaScript 1.5 MiB 82%
Fonts 131.7 KiB 7%
Other 98.9 KiB 5%
Images 61.6 KiB 3%
HTML 19.3 KiB 1%
CSS 15.9 KiB 1%
Other 1.8 KiB 0%
Other 928 B 0%
Other 520 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Image Optimization
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 62 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
5 fonts (132 KB)
PASS
5 fonts (132 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

132 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 3.3 s LCP 3.7 shttps://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Bold.woff2FinnairSans-Bold.woff2 https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Bold.woff2 — 26.8 KiB — 83 ms — font-display: swaphttps://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Light.woff2FinnairSans-Light.woff2 https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Light.woff2 — 25.5 KiB — 80 ms — font-display: swaphttps://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Medium.woff2FinnairSans-Medium.woff2 https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Medium.woff2 — 25.3 KiB — 93 ms — font-display: swaphttps://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Italic.woff2FinnairSans-Italic.woff2 https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Italic.woff2 — 27.8 KiB — 88 ms — font-display: swaphttps://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Regular.woff2FinnairSans-Regular.woff2 https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Regular.woff2 — 26.3 KiB — 83 ms — font-display: swap
FinnairSans-Bold.woff2 woff2 swap
Size 27 KB
Load time 83 ms
Start 224 ms
Risk FOUT — text flashes from fallback to web font
FinnairSans-Light.woff2 woff2 swap
Size 25 KB
Load time 80 ms
Start 225 ms
Risk FOUT — text flashes from fallback to web font
FinnairSans-Medium.woff2 woff2 swap
Size 25 KB
Load time 93 ms
Start 225 ms
Risk FOUT — text flashes from fallback to web font
FinnairSans-Italic.woff2 woff2 swap
Size 28 KB
Load time 88 ms
Start 225 ms
Risk FOUT — text flashes from fallback to web font
FinnairSans-Regular.woff2 woff2 swap
Size 26 KB
Load time 83 ms
Start 227 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
11 hints, 0 missing preconnects
PASS
11 hints, 0 missing preconnects
Info::
Page uses 11 resource hint(s)

Current Resource Hints

preconnect
5
preload
6
dns-prefetch
—
prefetch
—

11 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
57 requests over 1824ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 3.3 s LCP 3.7 shttps://finnair.com// https://finnair.com/ — 301 — 269 B — 27 ms — h2https://www.finnair.com/www.finnair.com/ https://www.finnair.com/ — 200 — 19.3 KiB — 186 ms — h2https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Bold.woff2cdn.finnair.com/fcom-ui-styles/prod... https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Bold.woff2 — 200 — 26.8 KiB — 83 ms — h2https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Light.woff2cdn.finnair.com/fcom-ui-styles/prod... https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Light.woff2 — 200 — 25.5 KiB — 80 ms — h2https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Medium.woff2cdn.finnair.com/fcom-ui-styles/prod... https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Medium.woff2 — 200 — 25.3 KiB — 93 ms — h2https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Italic.woff2cdn.finnair.com/fcom-ui-styles/prod... https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Italic.woff2 — 200 — 27.8 KiB — 88 ms — h2https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Regular.woff2cdn.finnair.com/fcom-ui-styles/prod... https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Regular.woff2 — 200 — 26.3 KiB — 83 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/styles-YYUNR2LD.csscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/styles-YYUNR2LD.css — 200 — 11.3 KiB — 94 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-BPAUIDL2.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-BPAUIDL2.js — 200 — 433 B — 83 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-WZMVWNYN.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-WZMVWNYN.js — 200 — 648 B — 85 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-PCQOFRGF.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-PCQOFRGF.js — 200 — 1.8 KiB — 54 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-O2QNROIF.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-O2QNROIF.js — 200 — 1.5 KiB — 63 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-T5ZFP2JY.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-T5ZFP2JY.js — 200 — 11.8 KiB — 56 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-IJYPKS6Q.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-IJYPKS6Q.js — 200 — 1.3 KiB — 56 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-WYI7NK6V.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-WYI7NK6V.js — 200 — 466 B — 57 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-BNKTUK3I.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-BNKTUK3I.js — 200 — 15.2 KiB — 64 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-S6GPM5VO.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-S6GPM5VO.js — 200 — 964 B — 58 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-IHJKLJ77.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-IHJKLJ77.js — 200 — 12.8 KiB — 66 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/polyfills-QJ4JGQLQ.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/polyfills-QJ4JGQLQ.js — 200 — 12.6 KiB — 58 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/main-ZOGP4QMC.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/main-ZOGP4QMC.js — 200 — 22.2 KiB — 71 ms — h2https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMBwww.finnair.com/hugRdc/o/W/WGiju3d_... https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMB — 200 — 182.1 KiB — 157 ms — h2https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/XV9O/cVhbAQ/TyA/mG0kySVdYwww.finnair.com/hugRdc/o/W/WGiju3d_... https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/XV9O/cVhbAQ/TyA/mG0kySVdY — 200 — 4.6 KiB — 84 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/assets/favicon/manifest.jsoncdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/assets/favicon/manifest.json — 200 — 520 B — 28 ms — h2https://www.finnair.com/akam/13/a2ab284www.finnair.com/akam/13/a2ab284 https://www.finnair.com/akam/13/a2ab284 — 200 — 9.4 KiB — 130 ms — h2https://s2.go-mpulse.net/boomerang/XCX6X-XLZQY-Y3L59-HYTY9-PFQT8s2.go-mpulse.net/boomerang/XCX6X-XL... https://s2.go-mpulse.net/boomerang/XCX6X-XLZQY-Y3L59-HYTY9-PFQT8 — 200 — 56.2 KiB — 34 ms — h2https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/XV9O/cVhbAQ/Qx9/wSwcVQw0qwww.finnair.com/hugRdc/o/W/WGiju3d_... https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/XV9O/cVhbAQ/Qx9/wSwcVQw0q — 200 — 32.2 KiB — 130 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-5JS398www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-5JS398 — 200 — 172.8 KiB — 98 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/media/flags-sprite-7XQ43Q3E.pngcdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/media/flags-sprite-7XQ43Q3E.png — 200 — 61.6 KiB — 44 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-K55ZYSP7.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-K55ZYSP7.js — 200 — 618 B — 7 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-RHXIJYDA.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-RHXIJYDA.js — 200 — 403 B — 20 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 3.3 s LCP 3.7 shttps://finnair.com// https://finnair.com/ — 301 — 269 B — 27 ms — h2https://www.finnair.com/www.finnair.com/ https://www.finnair.com/ — 200 — 19.3 KiB — 186 ms — h2https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Bold.woff2cdn.finnair.com/fcom-ui-styles/prod... https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Bold.woff2 — 200 — 26.8 KiB — 83 ms — h2https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Light.woff2cdn.finnair.com/fcom-ui-styles/prod... https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Light.woff2 — 200 — 25.5 KiB — 80 ms — h2https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Medium.woff2cdn.finnair.com/fcom-ui-styles/prod... https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Medium.woff2 — 200 — 25.3 KiB — 93 ms — h2https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Italic.woff2cdn.finnair.com/fcom-ui-styles/prod... https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Italic.woff2 — 200 — 27.8 KiB — 88 ms — h2https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Regular.woff2cdn.finnair.com/fcom-ui-styles/prod... https://cdn.finnair.com/fcom-ui-styles/prod/fonts/FinnairSans/FinnairSans-Regular.woff2 — 200 — 26.3 KiB — 83 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/styles-YYUNR2LD.csscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/styles-YYUNR2LD.css — 200 — 11.3 KiB — 94 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-BPAUIDL2.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-BPAUIDL2.js — 200 — 433 B — 83 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-WZMVWNYN.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-WZMVWNYN.js — 200 — 648 B — 85 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-PCQOFRGF.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-PCQOFRGF.js — 200 — 1.8 KiB — 54 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-O2QNROIF.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-O2QNROIF.js — 200 — 1.5 KiB — 63 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-T5ZFP2JY.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-T5ZFP2JY.js — 200 — 11.8 KiB — 56 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-IJYPKS6Q.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-IJYPKS6Q.js — 200 — 1.3 KiB — 56 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-WYI7NK6V.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-WYI7NK6V.js — 200 — 466 B — 57 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-BNKTUK3I.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-BNKTUK3I.js — 200 — 15.2 KiB — 64 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-S6GPM5VO.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-S6GPM5VO.js — 200 — 964 B — 58 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-IHJKLJ77.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-IHJKLJ77.js — 200 — 12.8 KiB — 66 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/polyfills-QJ4JGQLQ.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/polyfills-QJ4JGQLQ.js — 200 — 12.6 KiB — 58 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/main-ZOGP4QMC.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/main-ZOGP4QMC.js — 200 — 22.2 KiB — 71 ms — h2https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMBwww.finnair.com/hugRdc/o/W/WGiju3d_... https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMB — 200 — 182.1 KiB — 157 ms — h2https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/XV9O/cVhbAQ/TyA/mG0kySVdYwww.finnair.com/hugRdc/o/W/WGiju3d_... https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/XV9O/cVhbAQ/TyA/mG0kySVdY — 200 — 4.6 KiB — 84 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/assets/favicon/manifest.jsoncdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/assets/favicon/manifest.json — 200 — 520 B — 28 ms — h2https://www.finnair.com/akam/13/a2ab284www.finnair.com/akam/13/a2ab284 https://www.finnair.com/akam/13/a2ab284 — 200 — 9.4 KiB — 130 ms — h2https://s2.go-mpulse.net/boomerang/XCX6X-XLZQY-Y3L59-HYTY9-PFQT8s2.go-mpulse.net/boomerang/XCX6X-XL... https://s2.go-mpulse.net/boomerang/XCX6X-XLZQY-Y3L59-HYTY9-PFQT8 — 200 — 56.2 KiB — 34 ms — h2https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/XV9O/cVhbAQ/Qx9/wSwcVQw0qwww.finnair.com/hugRdc/o/W/WGiju3d_... https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/XV9O/cVhbAQ/Qx9/wSwcVQw0q — 200 — 32.2 KiB — 130 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-5JS398www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-5JS398 — 200 — 172.8 KiB — 98 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/media/flags-sprite-7XQ43Q3E.pngcdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/media/flags-sprite-7XQ43Q3E.png — 200 — 61.6 KiB — 44 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-K55ZYSP7.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-K55ZYSP7.js — 200 — 618 B — 7 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-RHXIJYDA.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-RHXIJYDA.js — 200 — 403 B — 20 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-FIZJXGY6.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-FIZJXGY6.js — 200 — 8.7 KiB — 26 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-O4O3PMEK.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-O4O3PMEK.js — 200 — 169.4 KiB — 33 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-WPU7L22M.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-WPU7L22M.js — 200 — 161.6 KiB — 57 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-R2CCB6LO.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-R2CCB6LO.js — 200 — 99.0 KiB — 61 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-NZ77GZAA.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-NZ77GZAA.js — 200 — 12.1 KiB — 48 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-SXAVQOWB.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-SXAVQOWB.js — 200 — 2.8 KiB — 49 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-BE6ZM4S3.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-BE6ZM4S3.js — 200 — 796 B — 51 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-2DJMQKAI.jscdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-2DJMQKAI.js — 200 — 428.1 KiB — 71 ms — h2https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMBwww.finnair.com/hugRdc/o/W/WGiju3d_... https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMB — 201 — 4.6 KiB — 430 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAACWCAYAAABkW7XSAAAQAElEQVR4AeycCXzVNbbHk3tbyl5AN…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAACWCAYAAABkW7XSAAAQAElEQVR4AeycCXzVNbbHk3tbyl5AN… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAACGFjVEwAAAABAAAAAcMq2TYAAAANS…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAACGFjVEwAAAABAAAAAcMq2TYAAAANS… — 200 — 0 B — 0 ms — datahttps://o4507887724986368.ingest.de.sentry.io/api/4508097692893264/envelope/?sentry_version=7&sentry_key=bce7d6be750ade48c6bc76b73d5ed1c5&sentry_client=sentry.javascript.browser%2F10.48.0o4507887724986368.ingest.de.sentry.... https://o4507887724986368.ingest.de.sentry.io/api/4508097692893264/envelope/?sentry_version=7&sentry_key=bce7d6be750ade48c6bc76b73d5ed1c5&sentry_client=sentry.javascript.browser%2F10.48.0 — 200 — 300 B — 45 ms — h2https://api.finnair.com/d/fcom/ux-translation-prod/current/translations/enapi.finnair.com/d/fcom/ux-translati... https://api.finnair.com/d/fcom/ux-translation-prod/current/translations/en — 200 — 38.4 KiB — 147 ms — h2https://api.finnair.com/d/fcom/ux-translation-prod/current/translations/en/bookingapi.finnair.com/d/fcom/ux-translati... https://api.finnair.com/d/fcom/ux-translation-prod/current/translations/en/booking — 200 — 42.3 KiB — 232 ms — h2https://cdn.c360a.salesforce.com/beacon/c360a/db5e18f4-83ad-4c55-81d1-9c17648c979c/scripts/c360a.min.jscdn.c360a.salesforce.com/beacon/c36... https://cdn.c360a.salesforce.com/beacon/c360a/db5e18f4-83ad-4c55-81d1-9c17648c979c/scripts/c360a.min.js — 200 — 110.0 KiB — 101 ms — h2https://auth.finnair.com/cas/ssoStatusauth.finnair.com/cas/ssoStatus https://auth.finnair.com/cas/ssoStatus — 200 — 1.8 KiB — 257 ms — h2https://api.finnair.com/timegeoapi.finnair.com/timegeo https://api.finnair.com/timegeo — 200 — 1.4 KiB — 96 ms — h2https://o4507887724986368.ingest.de.sentry.io/api/4508097692893264/envelope/?sentry_version=7&sentry_key=bce7d6be750ade48c6bc76b73d5ed1c5&sentry_client=sentry.javascript.browser%2F10.48.0o4507887724986368.ingest.de.sentry.... https://o4507887724986368.ingest.de.sentry.io/api/4508097692893264/envelope/?sentry_version=7&sentry_key=bce7d6be750ade48c6bc76b73d5ed1c5&sentry_client=sentry.javascript.browser%2F10.48.0 — 200 — 56 B — 21 ms — h2https://o4507887724986368.ingest.de.sentry.io/api/4508097692893264/envelope/?sentry_version=7&sentry_key=bce7d6be750ade48c6bc76b73d5ed1c5&sentry_client=sentry.javascript.browser%2F10.48.0o4507887724986368.ingest.de.sentry.... https://o4507887724986368.ingest.de.sentry.io/api/4508097692893264/envelope/?sentry_version=7&sentry_key=bce7d6be750ade48c6bc76b73d5ed1c5&sentry_client=sentry.javascript.browser%2F10.48.0 — 200 — 56 B — 20 ms — h2https://cms.finnair.com/en/3373092-3373092?view=fin-fragment-jsoncms.finnair.com/en/3373092-3373092?... https://cms.finnair.com/en/3373092-3373092?view=fin-fragment-json — 200 — 3.9 KiB — 129 ms — h2https://g-2t1yryh1ywmntfgy3wcnjzh0.c360a.salesforce.com/web/v2/authenticationg-2t1yryh1ywmntfgy3wcnjzh0.c360a.sa... https://g-2t1yryh1ywmntfgy3wcnjzh0.c360a.salesforce.com/web/v2/authentication — 200 — 925 B — 270 ms — h2https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/assets/favicon/favicon.icocdn.finnair.com/finnair-com-ux/lamb... https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/assets/favicon/favicon.ico — 200 — 1.5 KiB — 11 ms — h2https://c.go-mpulse.net/api/config.json?key=XCX6X-XLZQY-Y3L59-HYTY9-PFQT8&d=www.finnair.com&t=5920981&v=1.720.0&sl=0&si=2efd7512-30b9-4299-b114-4d979b4be204-tdk5ih&plugins=AK,ConfigOverride,Continuity,PageParams,IFrameDelay,AutoXHR,SPA,History,Angular,Backbone,Ember,RT,CrossDomain,BW,PaintTiming,NavigationTiming,ResourceTiming,Memory,CACHE_RELOAD,Errors,TPAnalytics,UserTiming,Akamai,Early,EventTiming,LOGN&acao=&ak.ai=221004c.go-mpulse.net/api/config.json?key... https://c.go-mpulse.net/api/config.json?key=XCX6X-XLZQY-Y3L59-HYTY9-PFQT8&d=www.finnair.com&t=5920981&v=1.720.0&sl=0&si=2efd7512-30b9-4299-b114-4d979b4be204-tdk5ih&plugins=AK,ConfigOverride,Continuity,PageParams,IFrameDelay,AutoXHR,SPA,History,Angular,Backbone,Ember,RT,CrossDomain,BW,PaintTiming,NavigationTiming,ResourceTiming,Memory,CACHE_RELOAD,Errors,TPAnalytics,UserTiming,Akamai,Early,EventTiming,LOGN&acao=&ak.ai=221004 — 200 — 213 B — 31 ms — h2https://www.finnair.com/akam/13/pixel_a2ab284www.finnair.com/akam/13/pixel_a2ab2... https://www.finnair.com/akam/13/pixel_a2ab284 — 200 — 726 B — 36 ms — h2https://g-2t1yryh1ywmntfgy3wcnjzh0.c360a.salesforce.com/web/events/db5e18f4-83ad-4c55-81d1-9c17648c979cg-2t1yryh1ywmntfgy3wcnjzh0.c360a.sa... https://g-2t1yryh1ywmntfgy3wcnjzh0.c360a.salesforce.com/web/events/db5e18f4-83ad-4c55-81d1-9c17648c979c — 204 — 516 B — 102 ms — h2blob:https://www.finnair.com/19ffa26b-5915-4926-b9d9-88ae9212b4a5www.finnair.com/19ffa26b-5915-4926-... blob:https://www.finnair.com/19ffa26b-5915-4926-b9d9-88ae9212b4a5 — -1 — 0 B — 0 ms — https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMBwww.finnair.com/hugRdc/o/W/WGiju3d_... https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMB — 201 — 4.6 KiB — 160 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 4451ms · 845KB · $59/mo
Unattributable
Other
Costly
Execution 1048ms
Transfer 0 KB
Monthly Cost $14/mo
cdn.finnair.com
Other
Costly
Execution 985ms
Transfer 13 KB
Monthly Cost $13/mo
www.finnair.com
Other
Costly
Execution 916ms
Transfer 5 KB
Unused 21%
Monthly Cost $12/mo
Google Tag Manager
Tag Manager
Costly
Execution 390ms
Transfer 173 KB
Unused 44%
Monthly Cost $5/mo
cdn.finnair.com
Other
Costly
Execution 389ms
Transfer 428 KB
Unused 46%
Monthly Cost $5/mo
www.finnair.com
Other
Optional
Execution 184ms
Transfer 9 KB
Monthly Cost $2/mo
www.finnair.com
Other
Optional
Execution 180ms
Transfer 19 KB
Monthly Cost $2/mo
cdn.c360a.salesforce.com
Other
Optional
Execution 160ms
Transfer 110 KB
Unused 70%
Monthly Cost $2/mo
s2.go-mpulse.net
Other
Optional
Execution 125ms
Transfer 56 KB
Unused 65%
Monthly Cost $2/mo
www.finnair.com
Other
Optional
Execution 75ms
Transfer 32 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 1048ms and costs ~$14/month
  • cdn.finnair.com adds 985ms and costs ~$13/month
  • www.finnair.com adds 916ms and costs ~$12/month
  • Google Tag Manager adds 390ms and costs ~$5/month
  • cdn.finnair.com adds 389ms and costs ~$5/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

Unattributable takes 1048ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdn.finnair.com takes 985ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.finnair.com takes 916ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 390ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdn.finnair.com takes 389ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

70% of cdn.c360a.salesforce.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

65% of s2.go-mpulse.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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