Flight Check

Best Airline: GRR to DEN

Grand Rapids to Denver — airline reliability comparison

United Airlines is the most reliable airline on the GRR to DEN route with a 84% on-time rate, compared to Frontier Airlines at 74%. Based on 2,615 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%
Southwest Airlines76%
Frontier Airlines74%

GRR to DEN Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest84%0.7%82m2,615
Southwest AirlinesWN76%0.3%48m1,237
Frontier AirlinesF9Worst74%0.8%69m542

Route Overview

80%
Overall On-Time
67m
Avg Delay
0.6%
Cancel Rate
4,466
Total Flights
GRR to DEN Route DetailsReturn: DEN to GRR
GRR AirportDEN Airport

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