Southwest Airlines is the most reliable airline on the PIT to STL route with a 85% on-time rate. Based on 1,482 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: PIT to STL
Pittsburgh to St. Louis — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines85%
PIT to STL Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 85% | 0.2% | 53m | 1,482 |
Route Overview
85%
Overall On-Time
53m
Avg Delay
0.2%
Cancel Rate
1,482
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.