Southwest Airlines is the most reliable airline on the MDW to IAH route with a 76% on-time rate, compared to Frontier Airlines at 68%. Based on 1,154 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: MDW to IAH
Chicago to Houston — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines76%
Frontier Airlines68%
MDW to IAH Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 76% | 1.4% | 53m | 1,154 |
| Frontier AirlinesF9Worst | 68% | 1.3% | 73m | 354 |
Route Overview
75%
Overall On-Time
57m
Avg Delay
1.3%
Cancel Rate
1,514
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.