Phoenix to Denver — airline reliability comparison
SkyWest Airlines is the most reliable airline on the PHX to DEN route with a 85% on-time rate, compared to at 71%. Based on 224 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 |
|---|---|---|---|---|
| SkyWest AirlinesOOBest | 85% | 0.0% | 57m | 224 |
| United AirlinesUA | 84% | 0.9% | 76m | 8,268 |
| Southwest AirlinesWN | 78% | 1.3% | 53m | 15,367 |
| Frontier AirlinesF9 | 77% | 0.9% | 83m | 5,241 |
| American AirlinesAA | 76% | 0.5% | 73m | 3,510 |
| MQWorst | 71% | 0.7% | 54m | 405 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.