Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → Chicago via Houston: arrives on time 63%
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05:00 SFO → 10:55 IAHUA 2168 · United · 3h 55m · 97% on time, 1.3% cancelled
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1h 00m layover in Houston (IAH) · 45 min minimum on one ticket
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11:55 IAH → 14:51 ORDUA 2827 · United · 2h 56m · 67% on time, 1.4% cancelled
Total trip 7h 51m, scheduled departure to arrival (Chicago is 2 h ahead of San Francisco). Times are local. Both flew on 56 of the last 56 days.
Makes the connection97%The first flight arrived more than 15 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 1h 00m layover.
Arrives on time63%First flight not cancelled (1.3% are) × connection made (97%) × second flight not cancelled (1.4% are) and within 15 minutes (67%).
Total trip7h 51mSFO 05:00 to ORD 14:51, 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.