Flight Check

Best Airline: ORD to PWM

Chicago to Portland — airline reliability comparison

Republic Airways is the most reliable airline on the ORD to PWM route with a 84% on-time rate, compared to Frontier Airlines at 36%. Based on 1,143 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 Airways84%
82%
United Airlines79%
SkyWest Airlines75%
Frontier Airlines36%

ORD to PWM Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Republic AirwaysYXBest84%2.8%62m1,143
MQ82%1.9%48m768
United AirlinesUA79%0.9%67m1,337
SkyWest AirlinesOO75%2.4%57m718
Frontier AirlinesF9Worst36%13.3%88m23

Route Overview

79%
Overall On-Time
63m
Avg Delay
1.8%
Cancel Rate
4,104
Total Flights
ORD to PWM Route DetailsReturn: PWM to ORD
ORD AirportPWM Airport

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