Route · IAD → SAT · 2020–2025 BTS data
Washington to San Antonio
The IAD–SAT corridor (Washington, DC → San Antonio, TX) runs ahead of the national average, served by 7 carriers across roughly 1,362 miles.
Data updated 2026-06-13
- 84.2%
- On-time
- +5.2 pts
- vs US avg
- 86 min
- Delay when late
- 3,318
- Flights
Cancelled
1.1%
Best Month
Oct 2025 98%
Worst Month
Jul 2025 69%
Distance
1,362 mi
Carriers
7
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 58 | 12 | 0 | 0 | UA |
| Nov 2025 | 60 | 9 | 0 | 0 | UA |
| Oct 2025 | 55 | 1 | 0 | 0 | UA |
| Sep 2025 | 51 | 5 | 0 | 0 | UA |
| Aug 2025 | 51 | 5 | 0 | 0 | UA |
| Jul 2025 | 58 | 18 | 0 | 0 | UA |
| Jun 2025 | 51 | 15 | 0 | 0 | UA |
| May 2025 | 54 | 13 | 1 | 0 | UA |
| Apr 2025 | 56 | 8 | 0 | 0 | UA |
| Mar 2025 | 51 | 10 | 0 | 0 | UA |
| Feb 2025 | 48 | 8 | 0 | 0 | UA |
| Jan 2025 | 54 | 15 | 1 | 0 | UA |
| Dec 2024 | 55 | 7 | 0 | 0 | UA |
| Nov 2024 | 51 | 6 | 0 | 0 | UA |
| Oct 2024 | 57 | 3 | 0 | 0 | UA |
| Sep 2024 | 48 | 3 | 0 | 0 | UA |
| Aug 2024 | 54 | 12 | 2 | 0 | UA |
| Jul 2024 | 58 | 15 | 0 | 0 | UA |
| Jun 2024 | 54 | 12 | 0 | 0 | UA |
| May 2024 | 61 | 18 | 0 | 0 | UA |
| Apr 2024 | 60 | 5 | 0 | 0 | UA |
| Mar 2024 | 54 | 9 | 0 | 0 | UA |
| Feb 2024 | 52 | 3 | 0 | 0 | UA |
| Jan 2024 | 56 | 10 | 10 | 0 | UA |
Cancellation Rate
1.1%
14 of 1,307 flights
Diversion Rate
0.0%
0 of 1,307 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
Origin airport →SAT - San Antonio
Full on-time, delay-cause, and seasonal performance for San Antonio, TX.
Destination airport →Compare the two airports
See IAD 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 IAD–SAT.
Routes with a similar on-time rate
What the Data Says About IAD to SAT
Bureau of Transportation Statistics records show Washington to San Antonio (IAD to SAT) running a 84.2% on-time rate over 3,318 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 85.9 minutes. The 1,362-mile corridor is served by 7 carriers, and over the last 24 months 1.1% of 1,307 flights were cancelled, 0.0% diverted.
The monthly split is wide on this route: Oct 2025 posted the strongest performance at 98% on-time, while Jul 2025 came in at just 69% - a 29-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from IAD to SAT? ▼
What is the cancellation rate for IAD 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.