Flight Check

Best Airline: DEN to SLC

Denver to Salt Lake City — airline reliability comparison

Delta Air Lines is the most reliable airline on the DEN to SLC route with a 84% on-time rate, compared to Frontier Airlines at 73%. Based on 5,984 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

Delta Air Lines84%
United Airlines79%
SkyWest Airlines77%
Southwest Airlines73%
Frontier Airlines73%

DEN to SLC Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Delta Air LinesDLBest84%0.5%88m5,984
United AirlinesUA79%0.6%60m4,451
SkyWest AirlinesOO77%1.0%71m5,074
Southwest AirlinesWN73%0.7%51m9,269
Frontier AirlinesF9Worst73%0.9%62m3,371

Route Overview

77%
Overall On-Time
63m
Avg Delay
0.7%
Cancel Rate
28,149
Total Flights
DEN to SLC Route DetailsReturn: SLC to DEN
DEN AirportSLC Airport

Flying out of DEN? We'll brief you.

Delays, TSA, weather, gates — we'll let you know if something matters.

Free. No account needed.

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