American Airlines is the most reliable airline on the IAH to MIA route with a 77% on-time rate, compared to Frontier Airlines at 67%. Based on 4,830 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAH to MIA
Houston to Miami — airline reliability comparison
On-Time Rate by Airline
American Airlines77%
United Airlines76%
Spirit Airlines75%
72%
Frontier Airlines67%
IAH to MIA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| American AirlinesAABest | 77% | 1.7% | 99m | 4,830 |
| United AirlinesUA | 76% | 1.5% | 66m | 4,747 |
| Spirit AirlinesNK | 75% | 2.5% | 78m | 1,707 |
| MQ | 72% | 0.9% | 72m | 551 |
| Frontier AirlinesF9Worst | 67% | 3.0% | 166m | 219 |
Route Overview
76%
Overall On-Time
86m
Avg Delay
1.8%
Cancel Rate
12,189
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.