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

Seattle → Philadelphia via Boston: arrives on time 31%

  1. 11:15 SEA → 19:43 BOS
    DL 438 · Delta · 5h 26m · 65% on time, 0.0% cancelled
  2. 57m layover in Boston (BOS) · 45 min minimum on one ticket
  3. 20:40 BOS → 22:22 PHL
    DL 5610 · Delta, flown by Republic · 1h 42m · 57% on time, 8.3% cancelled

Total trip 8h 07m, scheduled departure to arrival (Philadelphia is 3 h ahead of Seattle). Times are local. Both flew on 42 of the last 56 days.

Makes the connection59%The first flight arrived more than 12 minutes late on 41% of the days it flew: too late for the 45-minute minimum connection on a 57m layover.
Arrives on time31%First flight not cancelled (0.0% are) × connection made (59%) × second flight not cancelled (8.3% are) and within 15 minutes (57%).
Total trip8h 07mSEA 11:15 to PHL 22:22, 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.