Flight Check

Best Airline: ORD to RDU

Chicago to Raleigh — airline reliability comparison

Republic Airways is the most reliable airline on the ORD to RDU route with a 83% on-time rate, compared to Frontier Airlines at 64%. Based on 2,241 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 Airways83%
82%
SkyWest Airlines81%
United Airlines80%
American Airlines68%
Frontier Airlines64%

ORD to RDU Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Republic AirwaysYXBest83%1.5%65m2,241
MQ82%1.3%50m1,572
SkyWest AirlinesOO81%1.7%61m293
United AirlinesUA80%0.7%65m4,275
American AirlinesAA68%1.7%87m2,473
Frontier AirlinesF9Worst64%3.4%118m187

Route Overview

78%
Overall On-Time
73m
Avg Delay
1.3%
Cancel Rate
11,144
Total Flights
ORD to RDU Route DetailsReturn: RDU to ORD
ORD AirportRDU Airport

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