Denver to Tucson — airline reliability comparison
SkyWest Airlines is the most reliable airline on the DEN to TUS route with a 80% on-time rate, compared to Southwest Airlines at 72%. Based on 2,269 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 | 80% | 0.5% | 69m | 2,269 |
| Frontier AirlinesF9 | 80% | 0.0% | 56m | 81 |
| United AirlinesUA | 79% | 0.1% | 59m | 2,404 |
| Southwest AirlinesWNWorst | 72% | 0.8% | 51m | 4,266 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.