Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → Chicago via Columbus: arrives on time 93%
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21:23 SFO → 05:15 CMHUA 1939 · United · 4h 52m · 90% on time, 0.0% cancelled
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3h 45m layover in Columbus (CMH) · 90 min minimum on separate tickets
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09:00 CMH → 09:10 MDW +1 dayWN 1197 · Southwest · 1h 10m · 95% on time, 1.7% cancelled
Total trip 9h 47m, scheduled departure to arrival (Chicago is 2 h ahead of San Francisco). Times are local. Both flew on 21 of the last 56 days.
Makes the connection100%The first flight arrived more than 135 minutes late on 0% of the days it flew: too late for the 90-minute minimum connection on a 3h 45m layover.
Arrives on time93%First flight not cancelled (0.0% are) × connection made (100%) × second flight not cancelled (1.7% are) and within 15 minutes (95%).
Total trip9h 47mSFO 21:23 to MDW 09:10, layover included
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.