Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Las Vegas → Boston via St Louis: arrives on time 22%
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13:50 LAS → 19:05 STLWN 3851 · Southwest · 3h 15m · 56% on time, 0.0% cancelled
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50m layover in St Louis (STL) · 45 min minimum on one ticket
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19:55 STL → 23:25 BOSWN 4724 · Southwest · 2h 30m · 61% on time, 0.0% cancelled
Total trip 6h 35m, scheduled departure to arrival (Boston is 3 h ahead of Las Vegas). Times are local. Both flew on 31 of the last 56 days.
Makes the connection37%The first flight arrived more than 5 minutes late on 63% of the days it flew: too late for the 45-minute minimum connection on a 50m layover.
Arrives on time22%First flight not cancelled (0.0% are) × connection made (37%) × second flight not cancelled (0.0% are) and within 15 minutes (61%).
Total trip6h 35mLAS 13:50 to BOS 23:25, 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.