Flight Check

Best Airline: PIT to DEN

Pittsburgh to Denver — airline reliability comparison

United Airlines is the most reliable airline on the PIT to DEN route with a 85% on-time rate, compared to Southwest Airlines at 79%. Based on 2,933 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 Airlines85%
Frontier Airlines82%
Southwest Airlines79%

PIT to DEN Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest85%0.5%68m2,933
Frontier AirlinesF982%3.3%51m115
Southwest AirlinesWNWorst79%0.6%58m2,782

Route Overview

82%
Overall On-Time
61m
Avg Delay
0.6%
Cancel Rate
5,973
Total Flights
PIT to DEN Route DetailsReturn: DEN to PIT
PIT AirportDEN Airport

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