Flight Check

Best Airline: DEN to TYS

Denver to Knoxville — airline reliability comparison

United Airlines is the most reliable airline on the DEN to TYS route with a 82% on-time rate, compared to Frontier Airlines at 74%. Based on 698 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 Airlines82%
SkyWest Airlines76%
Southwest Airlines76%
Frontier Airlines74%

DEN to TYS Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest82%0.3%52m698
SkyWest AirlinesOO76%0.7%61m1,878
Southwest AirlinesWN76%0.0%39m67
Frontier AirlinesF9Worst74%0.0%56m369

Route Overview

78%
Overall On-Time
64m
Avg Delay
0.6%
Cancel Rate
3,393
Total Flights
DEN to TYS Route DetailsReturn: TYS to DEN
DEN AirportTYS Airport

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