Flight Check

Best Airline: SFO to ORD

San Francisco to Chicago — airline reliability comparison

United Airlines is the most reliable airline on the SFO to ORD route with a 81% on-time rate, compared to Alaska Airlines at 73%. Based on 12,592 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 Airlines81%
American Airlines79%
Alaska Airlines73%

SFO to ORD Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest81%1.0%68m12,592
American AirlinesAA79%1.0%103m4,544
Alaska AirlinesASWorst73%1.8%56m1,264

Route Overview

79%
Overall On-Time
75m
Avg Delay
1.1%
Cancel Rate
18,400
Total Flights
SFO to ORD Route DetailsReturn: ORD to SFO
SFO AirportORD Airport

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