Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → St Louis 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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1h 40m layover in Detroit (DTW) · 90 min minimum on separate tickets
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07:00 DTW → 07:35 STL +1 dayWN 1783 · Southwest · 1h 35m · 98% on time, 0.0% cancelled
Total trip 8h 05m, scheduled departure to arrival (St Louis is 2 h ahead of San Francisco). Times are local. Both flew on 25 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 90-minute minimum connection on a 1h 40m 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 (98%).
Total trip8h 05mSFO 21:30 to STL 07:35, 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.