Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → Houston via Chicago: arrives on time 36%
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12:00 SFO → 18:35 ORDUA 2317 · United · 4h 35m · 50% on time, 2.8% cancelled
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1h 27m layover in Chicago (ORD) · 45 min minimum on one ticket
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20:02 ORD → 22:59 IAHUA 2813 · United · 2h 57m · 56% on time, 2.8% cancelled
Total trip 8h 59m, scheduled departure to arrival (Houston is 2 h ahead of San Francisco). Times are local. Both flew on 56 of the last 56 days.
Makes the connection69%The first flight arrived more than 42 minutes late on 31% of the days it flew: too late for the 45-minute minimum connection on a 1h 27m layover.
Arrives on time36%First flight not cancelled (2.8% are) × connection made (69%) × second flight not cancelled (2.8% are) and within 15 minutes (56%).
Total trip8h 59mSFO 12:00 to IAH 22:59, layover included
Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.