Southwest Airlines is the most reliable airline on the SAT to STL route with a 87% on-time rate. Based on 1,864 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SAT to STL
San Antonio to St. Louis — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines87%
SAT to STL Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 87% | 0.7% | 52m | 1,864 |
Route Overview
87%
Overall On-Time
51m
Avg Delay
0.6%
Cancel Rate
1,864
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.