Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
New York → San Francisco via Houston: arrives on time 43%
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14:00 LGA → 17:01 IAHUA 2674 · United · 4h 01m · 64% on time, 1.4% cancelled
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1h 04m layover in Houston (IAH) · 45 min minimum on one ticket
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18:05 IAH → 20:10 SFOUA 1341 · United · 4h 05m · 62% on time, 1.5% cancelled
Total trip 9h 10m, scheduled departure to arrival (San Francisco is 3 h behind New York). Times are local. Both flew on 56 of the last 56 days.
Makes the connection71%The first flight arrived more than 19 minutes late on 29% of the days it flew: too late for the 45-minute minimum connection on a 1h 04m layover.
Arrives on time43%First flight not cancelled (1.4% are) × connection made (71%) × second flight not cancelled (1.5% are) and within 15 minutes (62%).
Total trip9h 10mLGA 14:00 to SFO 20:10, layover included
Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.