Southwest Airlines is the most reliable airline on the STL to AUS route with a 79% on-time rate, compared to at 74%. Based on 3,405 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: STL to AUS
St. Louis to Austin — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines79%
74%
STL to AUS Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 79% | 0.8% | 54m | 3,405 |
| MQWorst | 74% | 2.8% | 62m | 104 |
Route Overview
78%
Overall On-Time
55m
Avg Delay
0.8%
Cancel Rate
3,513
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.