tailodds FORECAST
Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Boston → San Diego via Denver: arrives on time 84%

  1. 09:40 BOS → 12:12 DEN
    UA 662 · United · 4h 32m · 91% on time, 0.7% cancelled
  2. 3h 43m layover in Denver (DEN) · 45 min minimum on one ticket
  3. 15:55 DEN → 17:20 SAN
    UA 1281 · United · 2h 25m · 85% on time, 0.3% cancelled

Total trip 10h 40m, scheduled departure to arrival (San Diego is 3 h behind Boston). Times are local. Both flew on 55 of the last 56 days.

Makes the connection99%The first flight arrived more than 178 minutes late on 1% of the days it flew: too late for the 45-minute minimum connection on a 3h 43m layover.
Arrives on time84%First flight not cancelled (0.7% are) × connection made (99%) × second flight not cancelled (0.3% are) and within 15 minutes (85%).
Total trip10h 40mBOS 09:40 to SAN 17:20, 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.