Flight Check

Best Airline: DEN to PIT

Denver to Pittsburgh — airline reliability comparison

Frontier Airlines is the most reliable airline on the DEN to PIT route with a 82% on-time rate, compared to Southwest Airlines at 68%. Based on 115 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

Frontier Airlines82%
United Airlines78%
Southwest Airlines68%

DEN to PIT Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Frontier AirlinesF9Best82%2.4%47m115
United AirlinesUA78%0.3%62m2,931
Southwest AirlinesWNWorst68%0.8%54m2,790

Route Overview

74%
Overall On-Time
58m
Avg Delay
0.5%
Cancel Rate
5,979
Total Flights
DEN to PIT Route DetailsReturn: PIT to DEN
DEN AirportPIT Airport

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