Flight Check

Best Airline: GSP to PHL

Greenville to Philadelphia — airline reliability comparison

PSA Airlines is the most reliable airline on the GSP to PHL route with a 89% on-time rate, compared to Republic Airways at 85%. Based on 1,521 flights tracked.

This route involves weather-prone airports, which can affect reliability regardless of airline.

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

PSA Airlines89%
Republic Airways85%

GSP to PHL Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
PSA AirlinesOHBest89%1.6%94m1,521
Republic AirwaysYXWorst85%4.5%46m183

Route Overview

88%
Overall On-Time
88m
Avg Delay
2%
Cancel Rate
1,718
Total Flights
GSP to PHL Route DetailsReturn: PHL to GSP
GSP AirportPHL Airport

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