Southwest Airlines is the most reliable airline on the BWI to MDW route with a 77% on-time rate, compared to Frontier Airlines at 68%. Based on 6,629 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: BWI to MDW
Baltimore to Chicago — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines77%
Frontier Airlines68%
BWI to MDW Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 77% | 1.7% | 53m | 6,629 |
| Frontier AirlinesF9Worst | 68% | 1.2% | 105m | 289 |
Route Overview
76%
Overall On-Time
57m
Avg Delay
1.6%
Cancel Rate
6,928
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.