Houston to Los Angeles — airline reliability comparison
Delta Air Lines is the most reliable airline on the IAH to LAX route with a 87% on-time rate, compared to Frontier Airlines at 72%. Based on 2,370 flights tracked.
This route involves high-congestion airports, which can affect reliability regardless of airline.
Source: Bureau of Transportation Statistics. Updated October 2026.| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 87% | 1.1% | 78m | 2,370 |
| SkyWest AirlinesOO | 83% | 0.6% | 75m | 1,329 |
| United AirlinesUA | 82% | 1.0% | 64m | 12,024 |
| Spirit AirlinesNK | 81% | 0.9% | 70m | 2,775 |
| Frontier AirlinesF9Worst | 72% | 1.3% | 66m | 559 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.