Route · SEA → SAT · 2020–2025 BTS data
Seattle to San Antonio
The SEA–SAT corridor (Seattle, WA → San Antonio, TX) runs behind the national average, served by 1 carrier across roughly 1,774 miles.
Data updated 2026-06-13
- 77.7%
- On-time
- -1.3 pts
- vs US avg
- 48 min
- Delay when late
- 2,754
- Flights
Cancelled
0.8%
Best Month
Dec 2023 85%
Worst Month
Aug 2024 59%
Distance
1,774 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 52 | 16 | 0 | 0 | AS |
| Nov 2025 | 50 | 11 | 2 | 0 | AS |
| Oct 2025 | 54 | 9 | 2 | 0 | AS |
| Sep 2025 | 47 | 3 | 0 | 0 | AS |
| Aug 2025 | 57 | 17 | 1 | 1 | AS |
| Jul 2025 | 61 | 24 | 1 | 0 | AS |
| Jun 2025 | 60 | 22 | 0 | 0 | AS |
| May 2025 | 60 | 12 | 0 | 0 | AS |
| Apr 2025 | 59 | 9 | 0 | 1 | AS |
| Mar 2025 | 45 | 5 | 0 | 0 | AS |
| Dec 2024 | 53 | 16 | 0 | 0 | AS |
| Nov 2024 | 50 | 9 | 1 | 0 | AS |
| Oct 2024 | 48 | 13 | 0 | 0 | AS |
| Sep 2024 | 48 | 17 | 0 | 0 | AS |
| Aug 2024 | 56 | 23 | 0 | 0 | AS |
| Jul 2024 | 62 | 11 | 0 | 0 | AS |
| Jun 2024 | 60 | 23 | 0 | 0 | AS |
| May 2024 | 62 | 11 | 0 | 0 | AS |
| Apr 2024 | 56 | 14 | 0 | 0 | AS |
| Mar 2024 | 57 | 13 | 0 | 0 | AS |
| Feb 2024 | 44 | 6 | 0 | 0 | AS |
| Jan 2024 | 37 | 10 | 3 | 0 | AS |
| Dec 2023 | 62 | 9 | 0 | 0 | AS |
| Nov 2023 | 44 | 5 | 0 | 0 | AS |
Cancellation Rate
0.8%
10 of 1,284 flights
Diversion Rate
0.2%
2 of 1,284 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 →SAT - San Antonio
Full on-time, delay-cause, and seasonal performance for San Antonio, TX.
Destination airport →Compare the two airports
See SEA and SAT 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–SAT.
Routes with a similar on-time rate
What the Data Says About SEA to SAT
The Seattle to San Antonio corridor (SEA to SAT) posts a 77.7% on-time rate on the lower edge of the average band, based on 2,754 tracked flights. Late flights run 48.1 minutes behind on average. 1 carrier cover the 1,774-mile route; over the last 24 months, 10 of 1,284 flights were cancelled (0.8%) and 0.2% diverted.
The monthly split is wide on this route: Dec 2023 posted the strongest performance at 85% on-time, while Aug 2024 came in at just 59% - a 27-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SEA to SAT? ▼
What is the cancellation rate for SEA to SAT? ▼
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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.