Flight Check

Best Airline: SLC to DEN

Salt Lake City to Denver — airline reliability comparison

SkyWest Airlines is the most reliable airline on the SLC to DEN route with a 84% on-time rate, compared to Frontier Airlines at 74%. Based on 5,045 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

SkyWest Airlines84%
Delta Air Lines79%
United Airlines78%
Southwest Airlines75%
Frontier Airlines74%

SLC to DEN Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
SkyWest AirlinesOOBest84%0.7%90m5,045
Delta Air LinesDL79%0.4%66m5,986
United AirlinesUA78%0.9%67m4,475
Southwest AirlinesWN75%0.9%51m9,240
Frontier AirlinesF9Worst74%1.3%78m3,371

Route Overview

78%
Overall On-Time
65m
Avg Delay
0.8%
Cancel Rate
28,117
Total Flights
SLC to DEN Route DetailsReturn: DEN to SLC
SLC AirportDEN Airport

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