Flight Check

Best Airline: IAD to PHL

Washington to Philadelphia — airline reliability comparison

Republic Airways is the most reliable airline on the IAD to PHL route with a 85% on-time rate. Based on 202 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

Republic Airways85%

IAD to PHL Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Republic AirwaysYXBest85%3.2%64m202

Route Overview

84%
Overall On-Time
71m
Avg Delay
4.5%
Cancel Rate
202
Total Flights
IAD to PHL Route DetailsReturn: PHL to IAD
IAD AirportPHL Airport

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