www.aircanada.com/home/us/en/aco/flights speed test — 20 Oct 2026

Measured from the wfix.shop server on 20 October 2026 at 14:33 UTC. Grade B (83/100), with the screenshots, the timings and the fixes that matter.

https://www.aircanada.com/home/us/en/aco/flights

20 October 2026 at 14:33 UTC · Free test · report pt_84e9a94cdf26

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Grade

83/100

Performance79/100

Structure88/100

13 audit(s) passed, 3 need work

First byte (TTFB)518 msmeasured from this server

Fully loaded4.75 sfirst byte + slowest asset

Requests26document + assets

Page weight263.2 KBcompressed transfer

HTML document8.9 KBgzip

ProtocolHTTP/3AmazonS3

Where the first byte went

DNS lookup 57 ms 11%
TCP connect 59 ms 11%
Server wait 402 ms 78%

Measured on the connection that fetched the HTML. Every other request on the page waits for the end of this bar before it can start.

How this page compares

First byteslower than 57% of 4,999 pages tested here518 ms against a median of 448 ms

Page weightlighter than 75% of 4,999 pages tested here263.2 KB against a median of 650.5 KB

Fully loadedslower than 90% of 4,999 pages tested here4.75 s against a median of 1.84 s

Requestssends more requests than 100% of 4,999 pages tested here26 against a median of 26

Every report published here is in this comparison, so it is a reference population of pages tested from one server - not a benchmark of the whole web.

What these numbers mean

The first byte took 518 ms. Everything else waits for that number, so the server is where to start: caching, a slow query, or an overloaded host.
The page transfers 263.2 KB over 26 request(s). Html files are 97% of it, so that one type is worth a look on its own.
The HTML itself arrives gzip-compressed.
It runs over HTTP/3, so the assets share a connection instead of opening one each.
The largest element took 2.55 s to paint, past the 2.5 s threshold: usually a hero image that is too big or a render-blocking script in front of it.
The main thread was blocked for 589 ms, so taps and scrolling wait while scripts run.

Fix first: Server response time (TTFB) - Cut server think time: page cache, query indexes, fewer synchronous calls to third parties inside the request. Connection setup is distance, so a nearer region or a CDN edge helps instead.

Read on one shared server, not a visitor's phone: use it to compare pages against each other, not as a promise about every connection. We fix what these tests find.

Screenshot

What the page looks like

Loaded in headless Chromium on this server. Click an image to open it full size.

Mobile screenshot of www.aircanada.com — **Mobile** 390 × 844 · 88.2 KB · page is 4142 px tall

Browser render

The same URL loaded in a real browser, so these are the readings curl cannot produce. The grade above is still built from the server measurements.

Largest contentful paint2.55 sgood is under 2.5 s

Cumulative layout shift0.000under 0.1 is stable

Total blocking time589 mslong tasks during load

First contentful paint2.55 sfirst content on screen

Browser page weight3.69 MB95 request(s), scripts included

Largest contentful paint2.55 s

Needs improvementgood under 2.5 s, poor over 4 s

Cumulative layout shift0.000

Goodgood under 0.1, poor over 0.25

Total blocking time589 ms

Needs improvementgood under 200 ms, poor over 600 ms

Page weight by type

What the page is made of

Html 25 requests

254.3 KB 97%

Transfer size, compressed as sent. 26 request(s) in total, 263.2 KB across all of them.

Top issues

Server response time (TTFB)

high impact

The first byte arrived after 518 ms. Of that, 402 ms was the server thinking and 116 ms was connection setup. A first byte under 400 ms is what a visitor feels as instant.

Fix: Cut server think time: page cache, query indexes, fewer synchronous calls to third parties inside the request. Connection setup is distance, so a nearer region or a CDN edge helps instead.

Render-blocking resources

high impact

3 render-blocking resource(s) in the document head (1 script(s), 2 stylesheet(s)). The page cannot paint until each one arrives.

Fix: Add defer or async to scripts that do not change the first paint, inline the critical CSS, and load the rest with media="print" plus an onload swap.

Avoid extra redirects

medium impact

2 redirect hop(s) before the page load started, each one a full round trip before the first byte.

Fix: Link to the canonical URL (and make sure http, the apex domain and www all point at it) so no visitor pays a redirect first.