Southwest Airlines is the most reliable airline on the BWI to STL route with a 80% on-time rate. Based on 4,577 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: BWI to STL
Baltimore to St. Louis — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines80%
BWI to STL Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 80% | 1.1% | 54m | 4,577 |
Route Overview
79%
Overall On-Time
54m
Avg Delay
1%
Cancel Rate
4,577
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.