Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → Houston via Detroit: arrives on time 92%
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21:30 SFO → 05:20 DTWUA 234 · United · 4h 50m · 100% on time, 0.0% cancelled
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55m layover in Detroit (DTW) · 45 min minimum on one ticket
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06:15 DTW → 08:11 IAH +1 dayUA 1229 · United · 2h 56m · 97% on time, 0.0% cancelled
Total trip 8h 41m, scheduled departure to arrival (Houston is 2 h ahead of San Francisco). Times are local. Both flew on 21 of the last 56 days.
Makes the connection94%The first flight arrived more than 10 minutes late on 6% of the days it flew: too late for the 45-minute minimum connection on a 55m layover.
Arrives on time92%First flight not cancelled (0.0% are) × connection made (94%) × second flight not cancelled (0.0% are) and within 15 minutes (97%).
Total trip8h 41mSFO 21:30 to IAH 08:11, 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.