Los Angeles to Denver — airline reliability comparison
United Airlines is the most reliable airline on the LAX to DEN route with a 87% on-time rate, compared to Spirit Airlines at 69%. Based on 11,213 flights tracked.
This route involves weather-prone airports and 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 |
|---|---|---|---|---|
| United AirlinesUABest | 87% | 0.8% | 71m | 11,213 |
| SkyWest AirlinesOO | 85% | 0.5% | 63m | 3,651 |
| Frontier AirlinesF9 | 79% | 1.0% | 91m | 1,582 |
| Southwest AirlinesWN | 79% | 0.9% | 55m | 7,329 |
| Delta Air LinesDL | 78% | 1.0% | 69m | 3,309 |
| Spirit AirlinesNKWorst | 69% | 2.5% | 65m | 119 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.