Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
New York → San Francisco via Houston: arrives on time 17%
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15:38 LGA → 18:46 IAHUA 1794 · United · 4h 08m · 62% on time, 2.3% cancelled
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49m layover in Houston (IAH) · 45 min minimum on one ticket
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19:35 IAH → 21:44 SFOUA 1976 · United · 4h 09m · 33% on time, 0.0% cancelled
Total trip 9h 06m, scheduled departure to arrival (San Francisco is 3 h behind New York). Times are local. Both flew on 23 of the last 56 days.
Makes the connection51%The first flight arrived more than 4 minutes late on 49% of the days it flew: too late for the 45-minute minimum connection on a 49m layover.
Arrives on time17%First flight not cancelled (2.3% are) × connection made (51%) × second flight not cancelled (0.0% are) and within 15 minutes (33%).
Total trip9h 06mLGA 15:38 to SFO 21:44, 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.