MDW (Chicago) to SFO (San Francisco) flights arrive on time 57% of the time. The most reliable airline on this route is Southwest Airlines at 62%. The average delay is 61 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated October 2026.MDW → SFO
MDW (Chicago) to SFO (San Francisco)
MDW → SFO on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is frequently delayed. About 57% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Southwest Airlines edges out Frontier Airlines on this route — 62% vs 51% on time.
Airline Comparison
Southwest Airlines leads at 62% on time; Frontier Airlines trails at 51%.
Accurate?
Good to know
Departing from MDW
79% on timeTSA is currently ~24 min. Best time: 4 AM (about 5 min).
Arriving at SFO
76% on timeWhen flights into SFO are late, the average delay is 69 minutes. Build buffer if you have ground plans.
If connecting at SFO: TSA is ~27 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.
Flying out of MDW? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated October 2026. Source: Bureau of Transportation Statistics.