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

Boston → Seattle via New York: arrives on time 31%

  1. 17:05 BOS → 18:43 JFK
    DL 5814 · Delta, flown by Republic · 1h 38m · 66% on time, 8.9% cancelled
  2. 47m layover in New York (JFK) · 45 min minimum on one ticket
  3. 19:30 JFK → 23:08 SEA
    DL 688 · Delta · 6h 38m · 68% on time, 3.9% cancelled

Total trip 9h 03m, scheduled departure to arrival (Seattle is 3 h behind Boston). Times are local. Both flew on 56 of the last 56 days.

Makes the connection51%The first flight arrived more than 2 minutes late on 49% of the days it flew: too late for the 45-minute minimum connection on a 47m layover.
Arrives on time31%First flight not cancelled (8.9% are) × connection made (51%) × second flight not cancelled (3.9% are) and within 15 minutes (68%).
Total trip9h 03mBOS 17:05 to SEA 23:08, 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.