Route · SAT → STL · 2020–2025 BTS data
San Antonio to St. Louis
The SAT–STL corridor (San Antonio, TX → St. Louis, MO) runs ahead of the national average, served by 1 carrier across roughly 786 miles.
Data updated 2026-06-13
- 87.9%
- On-time
- +8.9 pts
- vs US avg
- 54 min
- Delay when late
- 2,083
- Flights
Cancelled
0.9%
Best Month
Oct 2024 96%
Worst Month
May 2024 72%
Distance
786 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 40 | 6 | 0 | 0 | WN |
| Nov 2025 | 33 | 7 | 0 | 0 | WN |
| Oct 2025 | 53 | 5 | 0 | 0 | WN |
| Sep 2025 | 47 | 3 | 0 | 0 | WN |
| Aug 2025 | 47 | 4 | 0 | 0 | WN |
| Jul 2025 | 53 | 6 | 0 | 0 | WN |
| Jun 2025 | 52 | 9 | 0 | 0 | WN |
| May 2025 | 56 | 6 | 1 | 0 | WN |
| Apr 2025 | 56 | 9 | 0 | 0 | WN |
| Mar 2025 | 54 | 8 | 0 | 0 | WN |
| Feb 2025 | 36 | 1 | 0 | 0 | WN |
| Jan 2025 | 33 | 4 | 3 | 0 | WN |
| Dec 2024 | 40 | 7 | 0 | 0 | WN |
| Nov 2024 | 33 | 2 | 0 | 0 | WN |
| Oct 2024 | 52 | 2 | 0 | 0 | WN |
| Sep 2024 | 47 | 3 | 0 | 0 | WN |
| Aug 2024 | 48 | 4 | 0 | 0 | WN |
| Jul 2024 | 53 | 13 | 2 | 0 | WN |
| Jun 2024 | 51 | 9 | 0 | 0 | WN |
| May 2024 | 57 | 16 | 0 | 0 | WN |
| Apr 2024 | 55 | 10 | 1 | 0 | WN |
| Mar 2024 | 48 | 11 | 0 | 0 | WN |
| Jan 2024 | 32 | 1 | 3 | 1 | WN |
| Dec 2023 | 37 | 11 | 0 | 0 | WN |
Cancellation Rate
0.9%
10 of 1,113 flights
Diversion Rate
0.1%
1 of 1,113 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SAT - San Antonio
Full on-time, delay-cause, and seasonal performance for San Antonio, TX.
Origin airport →STL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
Destination airport →Compare the two airports
See SAT and STL side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SAT–STL.
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What the Data Says About SAT to STL
San Antonio to St. Louis (SAT to STL) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.9% on-time rate across 2,083 flights, with delays that do happen averaging 53.6 minutes. The corridor runs roughly 786 miles and is served by 1 carrier. Over the most recent 24 months, 10 of 1,113 flights were cancelled (0.9%) and 1 diverted (0.1%).
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 96% on-time, while May 2024 came in at just 72% - a 24-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SAT to STL? ▼
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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.