Flight Check

Best Airline: PHL to IAH

Philadelphia to Houston — airline reliability comparison

United Airlines is the most reliable airline on the PHL to IAH route with a 86% on-time rate, compared to Frontier Airlines at 65%. Based on 3,285 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

United Airlines86%
Republic Airways84%
American Airlines76%
PSA Airlines75%
Spirit Airlines68%
Frontier Airlines65%

PHL to IAH Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest86%1.2%77m3,285
Republic AirwaysYX84%0.0%70m93
American AirlinesAA76%2.4%75m2,221
PSA AirlinesOH75%1.9%50m163
Spirit AirlinesNK68%1.9%82m708
Frontier AirlinesF9Worst65%0.0%59m51

Route Overview

79%
Overall On-Time
80m
Avg Delay
1.9%
Cancel Rate
6,608
Total Flights
PHL to IAH Route DetailsReturn: IAH to PHL
PHL AirportIAH Airport

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