Flight Check

Best Airline: MKE to DEN

Milwaukee to Denver — airline reliability comparison

Southwest Airlines is the most reliable airline on the MKE to DEN route with a 84% on-time rate, compared to Frontier Airlines at 78%. Based on 4,696 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

Southwest Airlines84%
SkyWest Airlines83%
United Airlines81%
Frontier Airlines78%

MKE to DEN Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Southwest AirlinesWNBest84%0.9%58m4,696
SkyWest AirlinesOO83%0.8%70m1,757
United AirlinesUA81%1.0%75m2,106
Frontier AirlinesF9Worst78%1.7%64m464

Route Overview

82%
Overall On-Time
65m
Avg Delay
0.9%
Cancel Rate
9,083
Total Flights
MKE to DEN Route DetailsReturn: DEN to MKE
MKE AirportDEN Airport

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