Flight Check

Best Airline: GSP to DEN

Greenville to Denver — airline reliability comparison

SkyWest Airlines is the most reliable airline on the GSP to DEN route with a 84% on-time rate, compared to United Airlines at 74%. Based on 979 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%
United Airlines74%

GSP to DEN Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
SkyWest AirlinesOOBest84%1.6%62m979
United AirlinesUAWorst74%0.0%66m307

Route Overview

82%
Overall On-Time
65m
Avg Delay
1.1%
Cancel Rate
1,343
Total Flights
GSP to DEN Route DetailsReturn: DEN to GSP
GSP AirportDEN Airport

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