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

Boston → Seattle via Philadelphia: arrives on time 74%

  1. 06:00 BOS → 07:37 PHL
    AA 1146 · American · 1h 43m · 95% on time, 2.9% cancelled
  2. 58m layover in Philadelphia (PHL) · 45 min minimum on one ticket
  3. 08:35 PHL → 11:42 SEA
    AA 2534 · American · 6h 09m · 80% on time, 0.0% cancelled

Total trip 8h 44m, scheduled departure to arrival (Seattle is 3 h behind Boston). Times are local. Both flew on 55 of the last 56 days.

Makes the connection95%The first flight arrived more than 13 minutes late on 5% of the days it flew: too late for the 45-minute minimum connection on a 58m layover.
Arrives on time74%First flight not cancelled (2.9% are) × connection made (95%) × second flight not cancelled (0.0% are) and within 15 minutes (80%).
Total trip8h 44mBOS 06:00 to SEA 11:42, 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.