Flight Check

Best Airline: SFO to MDW

San Francisco to Chicago — airline reliability comparison

Southwest Airlines is the most reliable airline on the SFO to MDW route with a 80% on-time rate, compared to Frontier Airlines at 61%. Based on 961 flights tracked.

This route involves high-congestion airports, which can affect reliability regardless of airline.

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

Southwest Airlines80%
Frontier Airlines61%

SFO to MDW Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Southwest AirlinesWNBest80%0.7%44m961
Frontier AirlinesF9Worst61%0.5%68m305

Route Overview

75%
Overall On-Time
50m
Avg Delay
0.8%
Cancel Rate
1,285
Total Flights
SFO to MDW Route DetailsReturn: MDW to SFO
SFO AirportMDW Airport

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