Flight Check

Best Airline: ORD to GSP

Chicago to Greenville — airline reliability comparison

Republic Airways is the most reliable airline on the ORD to GSP route with a 86% on-time rate, compared to PSA Airlines at 43%. Based on 863 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

Republic Airways86%
78%
SkyWest Airlines76%
United Airlines72%
American Airlines62%
PSA Airlines43%

ORD to GSP Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Republic AirwaysYXBest86%1.7%55m863
MQ78%1.6%57m2,103
SkyWest AirlinesOO76%1.9%62m1,454
United AirlinesUA72%0.8%71m448
American AirlinesAA62%6.5%54m48
PSA AirlinesOHWorst43%6.7%117m149

Route Overview

77%
Overall On-Time
68m
Avg Delay
2.1%
Cancel Rate
5,123
Total Flights
ORD to GSP Route DetailsReturn: GSP to ORD
ORD AirportGSP Airport

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