Southwest Airlines is the most reliable airline on the AUS to STL route with a 83% on-time rate, compared to at 77%. Based on 3,432 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: AUS to STL
Austin to St. Louis — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines83%
77%
AUS to STL Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 83% | 0.5% | 46m | 3,432 |
| MQWorst | 77% | 2.9% | 63m | 103 |
Route Overview
82%
Overall On-Time
47m
Avg Delay
0.6%
Cancel Rate
3,539
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.