Tulsa to Denver — airline reliability comparison
Southwest Airlines is the most reliable airline on the TUL to DEN route with a 84% on-time rate, compared to United Airlines at 82%. Based on 3,463 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 |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 84% | 0.9% | 57m | 3,463 |
| SkyWest AirlinesOO | 82% | 1.0% | 76m | 3,110 |
| United AirlinesUAWorst | 82% | 1.1% | 45m | 1,104 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.