Flight Check

Best Airline: PHL to ORD

Philadelphia to Chicago — airline reliability comparison

Republic Airways is the most reliable airline on the PHL to ORD route with a 94% on-time rate, compared to Frontier Airlines at 59%. Based on 70 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 Airways94%
United Airlines81%
American Airlines78%
Frontier Airlines59%

PHL to ORD Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Republic AirwaysYXBest94%1.2%43m70
United AirlinesUA81%1.2%83m5,855
American AirlinesAA78%2.4%92m9,727
Frontier AirlinesF9Worst59%2.9%110m412

Route Overview

78%
Overall On-Time
91m
Avg Delay
2.1%
Cancel Rate
16,114
Total Flights
PHL to ORD Route DetailsReturn: ORD to PHL
PHL AirportORD Airport

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