Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → Houston via Las Vegas: arrives on time 91%
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05:00 SFO → 06:35 LASWN 4231 · Southwest · 1h 35m · 90% on time, 0.0% cancelled
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3h 50m layover in Las Vegas (LAS) · 90 min minimum on separate tickets
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10:25 LAS → 15:40 IAHUA 1711 · United · 3h 15m · 91% on time, 0.0% cancelled
Total trip 8h 40m, scheduled departure to arrival (Houston is 2 h ahead of San Francisco). Times are local. Both flew on 38 of the last 56 days.
Makes the connection100%The first flight arrived more than 140 minutes late on 0% of the days it flew: too late for the 90-minute minimum connection on a 3h 50m layover.
Arrives on time91%First flight not cancelled (0.0% are) × connection made (100%) × second flight not cancelled (0.0% are) and within 15 minutes (91%).
Total trip8h 40mSFO 05:00 to IAH 15:40, 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.