Flight Check

Best Airline: BWI to DEN

Baltimore to Denver — airline reliability comparison

United Airlines is the most reliable airline on the BWI to DEN route with a 85% on-time rate, compared to Frontier Airlines at 70%. Based on 3,260 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%
Southwest Airlines74%
Frontier Airlines70%

BWI to DEN Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest85%0.9%68m3,260
Southwest AirlinesWN74%1.2%51m6,951
Frontier AirlinesF9Worst70%1.4%83m392

Route Overview

77%
Overall On-Time
58m
Avg Delay
1.1%
Cancel Rate
10,644
Total Flights
BWI to DEN Route DetailsReturn: DEN to BWI
BWI AirportDEN Airport

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