Flight Check

Best Airline: DEN to MKE

Denver to Milwaukee — airline reliability comparison

Frontier Airlines is the most reliable airline on the DEN to MKE route with a 81% on-time rate, compared to Southwest Airlines at 74%. Based on 464 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 Airlines81%
United Airlines80%
SkyWest Airlines76%
Southwest Airlines74%

DEN to MKE Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Frontier AirlinesF9Best81%1.3%62m464
United AirlinesUA80%0.6%59m2,107
SkyWest AirlinesOO76%1.2%74m1,756
Southwest AirlinesWNWorst74%1.1%55m4,667

Route Overview

75%
Overall On-Time
60m
Avg Delay
0.9%
Cancel Rate
9,054
Total Flights
DEN to MKE Route DetailsReturn: MKE to DEN
DEN AirportMKE Airport

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