Route · STL → SAT · 2020–2025 BTS data
St. Louis to San Antonio
The STL–SAT corridor (St. Louis, MO → San Antonio, TX) runs ahead of the national average, served by 1 carrier across roughly 786 miles.
Data updated 2026-06-13
- 79.6%
- On-time
- +0.6 pts
- vs US avg
- 59 min
- Delay when late
- 2,127
- Flights
Cancelled
0.6%
Best Month
Mar 2025 89%
Worst Month
Jul 2024 66%
Distance
786 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 40 | 11 | 0 | 0 | WN |
| Nov 2025 | 33 | 3 | 0 | 0 | WN |
| Oct 2025 | 53 | 7 | 0 | 1 | WN |
| Sep 2025 | 47 | 6 | 0 | 0 | WN |
| Aug 2025 | 47 | 12 | 1 | 0 | WN |
| Jul 2025 | 53 | 10 | 0 | 0 | WN |
| Jun 2025 | 52 | 14 | 0 | 0 | WN |
| May 2025 | 56 | 19 | 0 | 0 | WN |
| Apr 2025 | 56 | 13 | 0 | 0 | WN |
| Mar 2025 | 54 | 6 | 1 | 0 | WN |
| Feb 2025 | 36 | 4 | 1 | 0 | WN |
| Jan 2025 | 32 | 4 | 3 | 0 | WN |
| Dec 2024 | 40 | 10 | 0 | 0 | WN |
| Nov 2024 | 33 | 4 | 0 | 0 | WN |
| Oct 2024 | 52 | 7 | 0 | 0 | WN |
| Sep 2024 | 47 | 6 | 0 | 0 | WN |
| Aug 2024 | 48 | 9 | 0 | 0 | WN |
| Jul 2024 | 53 | 18 | 0 | 1 | WN |
| Jun 2024 | 51 | 8 | 0 | 0 | WN |
| May 2024 | 57 | 19 | 0 | 0 | WN |
| Apr 2024 | 56 | 15 | 0 | 0 | WN |
| Mar 2024 | 52 | 11 | 0 | 0 | WN |
| Jan 2024 | 32 | 6 | 1 | 0 | WN |
| Dec 2023 | 37 | 5 | 0 | 0 | WN |
Cancellation Rate
0.6%
7 of 1,117 flights
Diversion Rate
0.2%
2 of 1,117 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
STL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
Origin airport →SAT - San Antonio
Full on-time, delay-cause, and seasonal performance for San Antonio, TX.
Destination airport →Compare the two airports
See STL 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 STL–SAT.
Routes with a similar on-time rate
Routes of a similar trip length
What the Data Says About STL to SAT
2,127 tracked flights put the STL to SAT pairing (St. Louis to San Antonio) at a 79.6% on-time rate, squarely in line with the wider network. Delays that do occur run 58.6 minutes on average. Across the 786-mile route and its 1 carrier, the trailing 24 months show 0.6% cancelled and 0.2% diverted (1,117 flights sampled).
The monthly split is wide on this route: Mar 2025 posted the strongest performance at 89% on-time, while Jul 2024 came in at just 66% - a 23-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from STL to SAT? ▼
What is the cancellation rate for STL 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.