Route · SEA → SAN · 2020–2025 BTS data
Seattle to San Diego
The SEA–SAN corridor (Seattle, WA → San Diego, CA) runs ahead of the national average, served by 14 carriers across roughly 1,050 miles.
Data updated 2026-06-13
- 83%
- On-time
- +4 pts
- vs US avg
- 54 min
- Delay when late
- 25,263
- Flights
Cancelled
1.2%
Best Month
Jan 2025 84%
Worst Month
Dec 2025 69%
Distance
1,050 mi
Carriers
14
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 358 | 110 | 7 | 3 | DL,AS |
| Nov 2025 | 319 | 91 | 0 | 3 | DL,AS |
| Oct 2025 | 348 | 83 | 8 | 3 | AS,DL |
| Sep 2025 | 387 | 69 | 6 | 4 | DL,AS |
| Aug 2025 | 426 | 116 | 7 | 0 | AS,DL |
| Jul 2025 | 446 | 104 | 12 | 1 | AS,DL |
| Jun 2025 | 427 | 96 | 3 | 0 | AS,DL |
| May 2025 | 412 | 94 | 1 | 0 | AS,DL |
| Apr 2025 | 366 | 69 | 0 | 0 | DL,AS |
| Mar 2025 | 354 | 67 | 2 | 1 | AS,DL |
| Feb 2025 | 306 | 75 | 5 | 1 | AS,DL |
| Jan 2025 | 345 | 55 | 2 | 1 | AS,DL,OO |
| Dec 2024 | 390 | 90 | 6 | 6 | AS,DL,OO |
| Nov 2024 | 353 | 68 | 0 | 0 | OO,AS,DL |
| Oct 2024 | 387 | 97 | 1 | 2 | AS,OO,DL |
| Sep 2024 | 422 | 78 | 2 | 0 | OO,AS,DL |
| Aug 2024 | 436 | 106 | 1 | 0 | AS,DL,OO |
| Jul 2024 | 438 | 96 | 5 | 1 | AS,DL |
| Jun 2024 | 410 | 103 | 0 | 0 | AS,DL,OO |
| May 2024 | 396 | 76 | 1 | 0 | AS,DL,OO |
| Apr 2024 | 368 | 71 | 1 | 0 | AS,DL,OO |
| Mar 2024 | 374 | 75 | 1 | 2 | AS,DL,OO |
| Feb 2024 | 336 | 62 | 1 | 0 | AS,DL,OO |
| Jan 2024 | 351 | 72 | 40 | 1 | AS,DL,OO |
Cancellation Rate
1.2%
112 of 9,155 flights
Diversion Rate
0.3%
29 of 9,155 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 →SAN - San Diego
Full on-time, delay-cause, and seasonal performance for San Diego, CA.
Destination airport →Compare the two airports
See SEA and SAN 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–SAN.
Routes with a similar on-time rate
What the Data Says About SEA to SAN
Bureau of Transportation Statistics records show Seattle to San Diego (SEA to SAN) running a 83% on-time rate over 25,263 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 53.9 minutes. The 1,050-mile corridor is served by 14 carriers, and over the last 24 months 1.2% of 9,155 flights were cancelled, 0.3% diverted.
Monthly performance varies moderately here: Jan 2025 was the strongest month at 84% on-time versus Dec 2025 at 69%, a 15-point difference.
Frequently Asked Questions
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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.