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https://finnair.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
4
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
79
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.

892 ms

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

3.16 s

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

75 ms

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.

1.71 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.

3.16 s

Page Load Progression

457 ms
914 ms
1.4 s
1.8 s
2.3 s
2.7 s
3.2 s
3.7 s
Checks
15
6 PASS 3 REVIEW 4 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 (2.0 MiB of 2.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
29 scripts, 708 KB unused
FIX
29 scripts, 708 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...: 76 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 708 KB
708 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 KB76 KB (44%)✓3rd
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-R2CCB6LO.js99 KB65 KB (65%)✓3rd
https://s2.go-mpulse.net/boomerang/XCX6X-XLZQY-Y3L59-HYTY9-PFQT856 KB36 KB (65%)✓3rd
https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMB180 KB36 KB (21%)✓3rd
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-BNKTUK3I.js15 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
58 resources · 2.0 MB · 708 KB savings available
FIX
58 resources · 2.0 MB · 708 KB savings available
Warning::
Page weight 1.0 MB over 1MB target
Got: 2.0 MB Expected: ≤ 1 MB
Info::
~708 KB of savings available
Warning::
57 third-party resources (100% of weight)
Info::
2 resources over 200KB
58 resources · 2.0 MiB · 57 third-party 1.0 MiB over 1MB target
JavaScript 73% · 1.5 MiB
Image 14% · 285.7 KiB
Font 6% · 131.7 KiB
Other 5% · 99.9 KiB
Document 1% · 20.0 KiB
CSS 1% · 15.9 KiB

~708.3 KiB of savings available

Remove unused JavaScript: 708.3 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
2.0 MB transferred, 58 requests
REVIEW
2.0 MB transferred, 58 requests
Info::
Page weighs 6.4 MB (2.0 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::
58 HTTP requests
Info::
Estimated 0.43 g CO2 per page load
2.0 MB / 2.4 MB budget
2.0 MB transferred
58 requests
0.43 g CO2 per page load
JavaScript 1.5 MiB 73%
Images 284.2 KiB 14%
Fonts 131.7 KiB 6%
Other 98.9 KiB 5%
HTML 19.3 KiB 1%
CSS 15.9 KiB 1%
Other 1.8 KiB 0%
Other 926 B 0%
Other 519 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
JS Execution Cost
Action
1055ms total JS execution
REVIEW
1055ms total JS execution
Warning::
https://cdn.finnair.com/finnair-com-ux/lambda/prod...: 274ms CPU time
Warning::
Unattributable: 254ms CPU time
Info::
https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii...: 202ms CPU time
Info::
https://cdn.finnair.com/finnair-com-ux/lambda/prod...: 103ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-5JS...: 83ms CPU time
Warning::
Third-party scripts: 1055ms (100% of total)

Main Thread Breakdown

Script Evaluation 66% Other 20% Script Parsing & Compilation 6% Style & Layout 4%
ScriptTotalScriptingParse/CompileParty
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/polyfills-QJ4JGQLQ.js274ms248ms0ms3rd
Unattributable254ms44ms0ms3rd
https://www.finnair.com/hugRdc/o/W/WGiju3d_kn5D/ii9OXw5EVEYJNkbY/IXh6AQ/SSZ/XFCMsSHMB202ms181ms17ms3rd
https://cdn.finnair.com/finnair-com-ux/lambda/prod/browser/chunk-2DJMQKAI.js103ms91ms2ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5JS39883ms64ms18ms3rd
https://www.finnair.com/akam/13/a2ab28481ms69ms2ms3rd
https://www.finnair.com/58ms4ms1ms3rd
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
4 images, 0 KB saveable
PASS
4 images, 0 KB saveable
Info::
All images are well-optimized
4 images 284 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 892 ms LCP 3.2 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 — 84 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 — 49 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 — 43 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 — 44 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 — 49 ms — font-display: swap
FinnairSans-Bold.woff2 woff2 swap
Size 27 KB
Load time 84 ms
Start 226 ms
Risk FOUT — text flashes from fallback to web font
FinnairSans-Light.woff2 woff2 swap
Size 25 KB
Load time 49 ms
Start 226 ms
Risk FOUT — text flashes from fallback to web font
FinnairSans-Medium.woff2 woff2 swap
Size 25 KB
Load time 43 ms
Start 226 ms
Risk FOUT — text flashes from fallback to web font
FinnairSans-Italic.woff2 woff2 swap
Size 28 KB
Load time 44 ms
Start 226 ms
Risk FOUT — text flashes from fallback to web font
FinnairSans-Regular.woff2 woff2 swap
Size 26 KB
Load time 49 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
58 requests over 1787ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 892 ms LCP 3.2 shttps://finnair.com// https://finnair.com/ — 301 — 268 B — 18 ms — h2https://www.finnair.com/www.finnair.com/ https://www.finnair.com/ — 200 — 19.3 KiB — 197 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 — 84 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 — 49 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 — 43 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 — 44 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 — 49 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 — 58 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 — 48 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 — 649 B — 82 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 — 58 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 — 59 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 — 83 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 — 60 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 — 465 B — 63 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 — 61 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 — 64 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 — 72 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 — 77 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 — 180.3 KiB — 88 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 — 48 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 — 519 B — 46 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 — 45 ms — h2https://www.finnair.com/akam/13/a2ab284www.finnair.com/akam/13/a2ab284 https://www.finnair.com/akam/13/a2ab284 — 200 — 9.4 KiB — 39 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 — 30 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 — 84 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 — 17 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 — 148 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 — 28 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 892 ms LCP 3.2 shttps://finnair.com// https://finnair.com/ — 301 — 268 B — 18 ms — h2https://www.finnair.com/www.finnair.com/ https://www.finnair.com/ — 200 — 19.3 KiB — 197 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 — 84 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 — 49 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 — 43 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 — 44 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 — 49 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 — 58 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 — 48 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 — 649 B — 82 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 — 58 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 — 59 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 — 83 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 — 60 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 — 465 B — 63 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 — 61 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 — 64 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 — 72 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 — 77 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 — 180.3 KiB — 88 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 — 48 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 — 519 B — 46 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 — 45 ms — h2https://www.finnair.com/akam/13/a2ab284www.finnair.com/akam/13/a2ab284 https://www.finnair.com/akam/13/a2ab284 — 200 — 9.4 KiB — 39 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 — 30 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 — 84 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 — 17 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 — 148 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 — 28 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 — 402 B — 31 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 — 33 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 — 65 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 — 69 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 — 67 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 — 63 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 — 46 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 — 49 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 — 70 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAACWCAYAAABkW7XSAAAQAElEQVR4AeycCZhUxbXHT3UPMwg4q…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAACWCAYAAABkW7XSAAAQAElEQVR4AeycCZhUxbXHT3UPMwg4q… — 200 — 0 B — 1 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 — 42 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 — 187 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 — 183 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 — 109.9 KiB — 12 ms — h2https://auth.finnair.com/cas/ssoStatusauth.finnair.com/cas/ssoStatus https://auth.finnair.com/cas/ssoStatus — 200 — 1.8 KiB — 303 ms — h2https://api.finnair.com/timegeoapi.finnair.com/timegeo https://api.finnair.com/timegeo — 200 — 1.4 KiB — 51 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 — 14 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 — 15 ms — h2https://www.finnair.com/akam/13/pixel_a2ab284www.finnair.com/akam/13/pixel_a2ab2... https://www.finnair.com/akam/13/pixel_a2ab284 — 200 — 725 B — 40 ms — h2https://g-2t1yryh1ywmntfgy3wcnjzh0.c360a.salesforce.com/web/v2/authenticationg-2t1yryh1ywmntfgy3wcnjzh0.c360a.sa... https://g-2t1yryh1ywmntfgy3wcnjzh0.c360a.salesforce.com/web/v2/authentication — 200 — 930 B — 267 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 — 54 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 — 6 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=439d7a25-939d-494c-9790-d1d0a72c241b-tdk5ix&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=439d7a25-939d-494c-9790-d1d0a72c241b-tdk5ix&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 — 73 ms — h2https://cms.finnair.com/resource/blob/3373080/d7f037563df94268ae7822b2046cc28a/country-language-selector-summer-season-image-data.jpg?impolicy=crop&width=2349&height=2349&x=452&y=309cms.finnair.com/resource/blob/33730... https://cms.finnair.com/resource/blob/3373080/d7f037563df94268ae7822b2046cc28a/country-language-selector-summer-season-image-data.jpg?impolicy=crop&width=2349&height=2349&x=452&y=309 — 200 — 222.5 KiB — 71 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 — 514 B — 96 ms — h2blob:https://www.finnair.com/919275d4-4425-4618-9ba6-f12423b566ddwww.finnair.com/919275d4-4425-4618-... blob:https://www.finnair.com/919275d4-4425-4618-9ba6-f12423b566dd — -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 — 206 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 1055ms · 647KB · $14/mo
cdn.finnair.com
Other
Costly
Execution 274ms
Transfer 13 KB
Monthly Cost $4/mo
Unattributable
Other
Costly
Execution 254ms
Transfer 0 KB
Monthly Cost $3/mo
www.finnair.com
Other
Costly
Execution 202ms
Transfer 5 KB
Unused 21%
Monthly Cost $3/mo
cdn.finnair.com
Other
Optional
Execution 103ms
Transfer 428 KB
Unused 46%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 83ms
Transfer 173 KB
Unused 44%
Monthly Cost $1/mo
www.finnair.com
Other
Optional
Execution 81ms
Transfer 9 KB
Monthly Cost $1/mo
www.finnair.com
Other
Optional
Execution 58ms
Transfer 19 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • cdn.finnair.com adds 274ms and costs ~$4/month
  • Unattributable adds 254ms and costs ~$3/month
  • www.finnair.com adds 202ms and costs ~$3/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

cdn.finnair.com takes 274ms 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

Unattributable takes 254ms 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 202ms 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

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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