Southwest Airlines is the most reliable airline on the IAH to MDW route with a 84% on-time rate, compared to Frontier Airlines at 65%. Based on 1,137 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAH to MDW
Houston to Chicago — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines84%
Frontier Airlines65%
IAH to MDW Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 84% | 1.2% | 64m | 1,137 |
| Frontier AirlinesF9Worst | 65% | 1.6% | 103m | 354 |
Route Overview
80%
Overall On-Time
74m
Avg Delay
1.3%
Cancel Rate
1,498
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.