Flight Check

Best Airline: DEN to CLE

Denver to Cleveland — airline reliability comparison

Frontier Airlines is the most reliable airline on the DEN to CLE route with a 83% on-time rate, compared to Southwest Airlines at 66%. Based on 987 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 Airlines83%
United Airlines81%
Southwest Airlines66%

DEN to CLE Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Frontier AirlinesF9Best83%1.0%67m987
United AirlinesUA81%0.3%64m3,513
Southwest AirlinesWNWorst66%0.4%49m2,034

Route Overview

77%
Overall On-Time
60m
Avg Delay
0.5%
Cancel Rate
6,550
Total Flights
DEN to CLE Route DetailsReturn: CLE to DEN
DEN AirportCLE Airport

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