Route · SEA → LAX · 2020–2025 BTS data
Seattle to Los Angeles
The SEA–LAX corridor (Seattle, WA → Los Angeles, CA) runs ahead of the national average, served by 43 carriers across roughly 954 miles.
Data updated 2026-06-13
- 84%
- On-time
- +5 pts
- vs US avg
- 62 min
- Delay when late
- 41,859
- Flights
Cancelled
0.9%
Best Month
Jan 2025 91%
Worst Month
Dec 2025 74%
Distance
954 mi
Carriers
43
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 632 | 163 | 11 | 0 | DL,F9,AS,UA,OO |
| Nov 2025 | 604 | 90 | 9 | 2 | OO,UA,DL,F9,AS |
| Oct 2025 | 614 | 84 | 8 | 0 | AS,OO,UA,DL,F9 |
| Sep 2025 | 605 | 68 | 2 | 0 | UA,OO,DL,F9,AA,AS |
| Aug 2025 | 635 | 125 | 3 | 0 | OO,F9,UA,AS,DL |
| Jul 2025 | 642 | 141 | 8 | 0 | AS,OO,UA,DL,F9 |
| Jun 2025 | 633 | 124 | 4 | 0 | AS,OO,UA,DL,F9 |
| May 2025 | 654 | 107 | 3 | 0 | AS,NK,OO,UA,DL,F9 |
| Apr 2025 | 587 | 67 | 1 | 0 | DL,F9,NK,OO,UA,AS |
| Mar 2025 | 609 | 91 | 6 | 0 | AS,OO,UA,NK,DL,F9 |
| Feb 2025 | 555 | 124 | 8 | 0 | AS,DL,OO,UA,F9,NK |
| Jan 2025 | 624 | 57 | 1 | 3 | AS,OO,UA,DL,F9,NK |
| Dec 2024 | 642 | 111 | 3 | 0 | AS,DL,F9,NK,OO,UA |
| Nov 2024 | 587 | 62 | 1 | 0 | OO,UA,NK,AS,DL |
| Oct 2024 | 642 | 102 | 3 | 0 | UA,AS,OO,DL,NK |
| Sep 2024 | 649 | 94 | 1 | 0 | OO,UA,AS,DL,NK |
| Aug 2024 | 693 | 149 | 6 | 0 | AS,DL,NK,OO,UA |
| Jul 2024 | 694 | 148 | 12 | 1 | AS,DL,NK,OO,UA |
| Jun 2024 | 645 | 124 | 2 | 1 | AS,DL,OO,UA |
| May 2024 | 630 | 106 | 2 | 0 | AS,DL,OO,UA |
| Apr 2024 | 599 | 107 | 0 | 0 | AS,DL,OO,UA |
| Mar 2024 | 567 | 114 | 1 | 0 | AS,DL,OO,UA |
| Feb 2024 | 505 | 79 | 1 | 1 | AS,DL,OO,UA |
| Jan 2024 | 527 | 75 | 41 | 0 | AS,DL,OO,UA |
Cancellation Rate
0.9%
137 of 14,774 flights
Diversion Rate
0.1%
8 of 14,774 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Origin airport →LAX - Los Angeles
Full on-time, delay-cause, and seasonal performance for Los Angeles, CA.
Destination airport →Compare the two airports
See SEA and LAX side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SEA–LAX.
Routes with a similar on-time rate
What the Data Says About SEA to LAX
Bureau of Transportation Statistics records show Seattle to Los Angeles (SEA to LAX) running a 84% on-time rate over 41,859 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 61.6 minutes. The 954-mile corridor is served by 43 carriers, and over the last 24 months 0.9% of 14,774 flights were cancelled, 0.1% diverted.
The monthly split is wide on this route: Jan 2025 posted the strongest performance at 91% on-time, while Dec 2025 came in at just 74% - a 17-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SEA to LAX? ▼
What is the cancellation rate for SEA to LAX? ▼
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Flight Guides
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.