United Airlines is the most reliable airline on the PHX to IAH route with a 87% on-time rate, compared to Frontier Airlines at 75%. Based on 5,941 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: PHX to IAH
Phoenix to Houston — airline reliability comparison
On-Time Rate by Airline
United Airlines87%
84%
American Airlines81%
SkyWest Airlines81%
Frontier Airlines75%
PHX to IAH Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 87% | 1.0% | 86m | 5,941 |
| MQ | 84% | 1.5% | 47m | 327 |
| American AirlinesAA | 81% | 1.1% | 75m | 1,665 |
| SkyWest AirlinesOO | 81% | 1.2% | 76m | 861 |
| Frontier AirlinesF9Worst | 75% | 1.0% | 74m | 882 |
Route Overview
84%
Overall On-Time
81m
Avg Delay
1%
Cancel Rate
9,744
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.