Flight Check

Best Airline: MDW to SFO

Chicago to San Francisco — airline reliability comparison

Southwest Airlines is the most reliable airline on the MDW to SFO route with a 62% on-time rate, compared to Frontier Airlines at 51%. Based on 960 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 Airlines62%
Frontier Airlines51%

MDW to SFO Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
Southwest AirlinesWNBest62%0.7%58m960
Frontier AirlinesF9Worst51%2.2%79m305

Route Overview

57%
Overall On-Time
61m
Avg Delay
1.2%
Cancel Rate
1,284
Total Flights
MDW to SFO Route DetailsReturn: SFO to MDW
MDW AirportSFO Airport

Flying out of MDW? We'll brief you.

Delays, TSA, weather, gates — we'll let you know if something matters.

Free. No account needed.

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