Tucson to Denver — airline reliability comparison
SkyWest Airlines is the most reliable airline on the TUS to DEN route with a 85% on-time rate, compared to Frontier Airlines at 80%. Based on 2,271 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% | 0.9% | 77m | 2,271 |
| United AirlinesUA | 85% | 0.4% | 80m | 2,402 |
| Southwest AirlinesWN | 82% | 0.8% | 58m | 4,279 |
| Frontier AirlinesF9Worst | 80% | 0.0% | 58m | 81 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.