Flight Check

Best Airline: ATL to DEN

Atlanta to Denver — airline reliability comparison

United Airlines is the most reliable airline on the ATL to DEN route with a 84% on-time rate, compared to Frontier Airlines at 64%. Based on 3,712 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 Airlines84%
Delta Air Lines79%
Southwest Airlines77%
Frontier Airlines64%

ATL to DEN Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest84%1.2%85m3,712
Delta Air LinesDL79%0.9%50m10,233
Southwest AirlinesWN77%0.8%54m4,673
Frontier AirlinesF9Worst64%1.6%83m2,475

Route Overview

77%
Overall On-Time
61m
Avg Delay
1%
Cancel Rate
21,094
Total Flights
ATL to DEN Route DetailsReturn: DEN to ATL
ATL AirportDEN Airport

Flying out of ATL? 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.