Flight Check

Best Airline: DEN to PHX

Denver to Phoenix — airline reliability comparison

United Airlines is the most reliable airline on the DEN to PHX route with a 80% on-time rate, compared to at 68%. Based on 8,275 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.

On-Time Rate by Airline

United Airlines80%
SkyWest Airlines80%
American Airlines77%
Frontier Airlines75%
Southwest Airlines74%
68%

DEN to PHX Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest80%0.8%63m8,275
SkyWest AirlinesOO80%0.0%72m216
American AirlinesAA77%0.7%98m3,508
Frontier AirlinesF975%0.7%67m5,244
Southwest AirlinesWN74%1.3%54m15,266
MQWorst68%0.7%84m405

Route Overview

76%
Overall On-Time
62m
Avg Delay
1%
Cancel Rate
32,963
Total Flights
DEN to PHX Route DetailsReturn: PHX to DEN
DEN AirportPHX Airport

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Data last updated October 2026. Source: Bureau of Transportation Statistics.