Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → Houston via Boston: arrives on time 82%
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21:25 SFO → 06:21 BOSUA 796 · United · 5h 56m · 87% on time, 0.5% cancelled
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1h 04m layover in Boston (BOS) · 45 min minimum on one ticket
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07:25 BOS → 10:35 IAH +1 dayUA 226 · United · 4h 10m · 94% on time, 1.9% cancelled
Total trip 11h 10m, scheduled departure to arrival (Houston is 2 h ahead of San Francisco). Times are local. Both flew on 41 of the last 56 days.
Makes the connection90%The first flight arrived more than 19 minutes late on 10% of the days it flew: too late for the 45-minute minimum connection on a 1h 04m layover.
Arrives on time82%First flight not cancelled (0.5% are) × connection made (90%) × second flight not cancelled (1.9% are) and within 15 minutes (94%).
Total trip11h 10mSFO 21:25 to IAH 10:35, 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.