United Airlines is the most reliable airline on the IAH to ONT route with a 72% on-time rate, compared to Frontier Airlines at 63%. Based on 802 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAH to ONT
Houston to Ontario — airline reliability comparison
On-Time Rate by Airline
United Airlines72%
Frontier Airlines63%
IAH to ONT Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 72% | 0.5% | 65m | 802 |
| Frontier AirlinesF9Worst | 63% | 2.5% | 62m | 356 |
Route Overview
69%
Overall On-Time
66m
Avg Delay
1.1%
Cancel Rate
1,219
Total Flights
Flying out of IAH? We'll brief you.
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Data last updated October 2026. Source: Bureau of Transportation Statistics.