United Airlines is the most reliable airline on the MIA to IAH route with a 80% on-time rate, compared to American Airlines at 69%. Based on 4,744 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: MIA to IAH
Miami to Houston — airline reliability comparison
On-Time Rate by Airline
United Airlines80%
80%
Frontier Airlines76%
Spirit Airlines70%
American Airlines69%
MIA to IAH Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 80% | 1.6% | 83m | 4,744 |
| MQ | 80% | 0.8% | 48m | 551 |
| Frontier AirlinesF9 | 76% | 2.6% | 68m | 220 |
| Spirit AirlinesNK | 70% | 2.4% | 77m | 1,710 |
| American AirlinesAAWorst | 69% | 1.5% | 75m | 4,833 |
Route Overview
74%
Overall On-Time
79m
Avg Delay
1.7%
Cancel Rate
12,193
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.