Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → Philadelphia via Houston: arrives on time 82%
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23:59 SFO → 06:04 IAHUA 505 · United · 4h 05m · 82% on time, 0.3% cancelled
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1h 27m layover in Houston (IAH) · 45 min minimum on one ticket
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07:31 IAH → 11:58 PHL +1 dayUA 2642 · United · 3h 27m · 89% on time, 0.0% cancelled
Total trip 8h 59m, scheduled departure to arrival (Philadelphia is 3 h ahead of San Francisco). Times are local. Both flew on 37 of the last 56 days.
Makes the connection93%The first flight arrived more than 42 minutes late on 7% of the days it flew: too late for the 45-minute minimum connection on a 1h 27m layover.
Arrives on time82%First flight not cancelled (0.3% are) × connection made (93%) × second flight not cancelled (0.0% are) and within 15 minutes (89%).
Total trip8h 59mSFO 23:59 to PHL 11:58, 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.