Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Boston → Los Angeles via Denver: arrives on time 8%
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17:30 BOS → 20:10 DENWN 742 · Southwest · 4h 40m · 29% on time, 0.0% cancelled
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55m layover in Denver (DEN) · 45 min minimum on one ticket
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21:05 DEN → 22:40 LAXWN 3110 · Southwest · 2h 30m · 39% on time, 0.0% cancelled
Total trip 8h 05m, scheduled departure to arrival (Los Angeles is 3 h behind Boston). Times are local. Both flew on 39 of the last 56 days.
Makes the connection21%The first flight arrived more than 10 minutes late on 79% of the days it flew: too late for the 45-minute minimum connection on a 55m layover.
Arrives on time8%First flight not cancelled (0.0% are) × connection made (21%) × second flight not cancelled (0.0% are) and within 15 minutes (39%).
Total trip8h 05mBOS 17:30 to LAX 22:40, 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.