MDW (Chicago) to SFO (San Francisco) flights arrive on time 64% of the time. The most reliable airline on this route is Southwest Airlines at 68%. The average delay is 58 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated March 2026.MDW → SFO
MDW (Chicago) to SFO (San Francisco)
MDW → SFO on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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This route is frequently delayed. About 64% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Southwest Airlines is significantly more reliable on this route at 68% on time vs Frontier Airlines at 36%.
Airline Comparison
Southwest Airlines leads at 68% on time; Frontier Airlines trails at 36%.
Accurate?
Good to know
Departing from MDW
78% on timeTSA is currently ~16 min. Best time: 4 AM (about 5 min).
Arriving at SFO
80% on timeWhen flights into SFO are late, the average delay is 67 minutes. Build buffer if you have ground plans.
If connecting at SFO: TSA is ~14 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Southwest Airlines owes you — refund rights, action plan, complaint email. Free.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.