Flight Check

Best Airline: SJU to ORD

San Juan to Chicago — airline reliability comparison

United Airlines is the most reliable airline on the SJU to ORD route with a 83% on-time rate, compared to Frontier Airlines at 71%. Based on 1,967 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

United Airlines83%
Spirit Airlines80%
American Airlines74%
Frontier Airlines71%

SJU to ORD Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest83%0.7%46m1,967
Spirit AirlinesNK80%1.9%59m1,186
American AirlinesAA74%0.6%92m1,147
Frontier AirlinesF9Worst71%3.3%61m42

Route Overview

80%
Overall On-Time
72m
Avg Delay
1.2%
Cancel Rate
4,350
Total Flights
SJU to ORD Route DetailsReturn: ORD to SJU
SJU AirportORD Airport

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