Southwest Airlines is the most reliable airline on the STL to PIT route with a 82% on-time rate. Based on 1,496 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: STL to PIT
St. Louis to Pittsburgh — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines82%
STL to PIT Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 82% | 0.2% | 58m | 1,496 |
Route Overview
81%
Overall On-Time
58m
Avg Delay
0.2%
Cancel Rate
1,496
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.