Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Boston → San Diego via Denver: arrives on time 84%
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07:45 BOS → 10:19 DENDL 499 · Delta · 4h 34m · 85% on time, 1.6% cancelled
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3h 11m layover in Denver (DEN) · 90 min minimum on separate tickets
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13:30 DEN → 14:55 SANUA 1302 · United · 2h 25m · 87% on time, 0.9% cancelled
Total trip 10h 10m, scheduled departure to arrival (San Diego is 3 h behind Boston). Times are local. Both flew on 56 of the last 56 days.
Makes the connection99%The first flight arrived more than 101 minutes late on 1% of the days it flew: too late for the 90-minute minimum connection on a 3h 11m layover.
Arrives on time84%First flight not cancelled (1.6% are) × connection made (99%) × second flight not cancelled (0.9% are) and within 15 minutes (87%).
Total trip10h 10mBOS 07:45 to SAN 14:55, layover included
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.