Flight Check

Best Airline: RSW to DEN

Fort Myers to Denver — airline reliability comparison

United Airlines is the most reliable airline on the RSW to DEN route with a 81% on-time rate, compared to Frontier Airlines at 72%. Based on 2,442 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 Airlines81%
Southwest Airlines79%
Frontier Airlines72%

RSW to DEN Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest81%1.2%78m2,442
Southwest AirlinesWN79%0.7%56m647
Frontier AirlinesF9Worst72%2.6%69m203

Route Overview

81%
Overall On-Time
76m
Avg Delay
1.2%
Cancel Rate
3,439
Total Flights
RSW to DEN Route DetailsReturn: DEN to RSW
RSW AirportDEN Airport

Flying out of RSW? 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.