Southwest Airlines is the most reliable airline on the STL to MDW route with a 84% on-time rate. Based on 6,843 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: STL to MDW
St. Louis to Chicago — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines84%
STL to MDW Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 84% | 1.4% | 55m | 6,843 |
Route Overview
83%
Overall On-Time
55m
Avg Delay
1.3%
Cancel Rate
6,843
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.