Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Las Vegas → Boston via San Francisco: arrives on time 57%
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19:52 LAS → 21:34 SFOUA 1267 · United · 1h 42m · 40% on time, 0.0% cancelled
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1h 31m layover in San Francisco (SFO) · 45 min minimum on one ticket
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23:05 SFO → 08:01 BOS +1 dayUA 1665 · United · 5h 56m · 84% on time, 1.5% cancelled
Total trip 9h 09m, scheduled departure to arrival (Boston is 3 h ahead of Las Vegas). Times are local. Both flew on 55 of the last 56 days.
Makes the connection69%The first flight arrived more than 46 minutes late on 31% of the days it flew: too late for the 45-minute minimum connection on a 1h 31m layover.
Arrives on time57%First flight not cancelled (0.0% are) × connection made (69%) × second flight not cancelled (1.5% are) and within 15 minutes (84%).
Total trip9h 09mLAS 19:52 to BOS 08:01, 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.