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

Portland → Boston via Seattle: arrives on time 70%

  1. 11:20 PDX → 12:36 SEA
    DL 3818 · Delta, flown by SkyWest · 1h 16m · 91% on time, 0.3% cancelled
  2. 3h 24m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 16:00 SEA → 00:21 BOS +1 day
    DL 474 · Delta · 5h 21m · 71% on time, 1.8% cancelled

Total trip 10h 01m, scheduled departure to arrival (Boston is 3 h ahead of Portland). Times are local. Both flew on 48 of the last 56 days.

Makes the connection99%The first flight arrived more than 159 minutes late on 1% of the days it flew: too late for the 45-minute minimum connection on a 3h 24m layover.
Arrives on time70%First flight not cancelled (0.3% are) × connection made (99%) × second flight not cancelled (1.8% are) and within 15 minutes (71%).
Total trip10h 01mPDX 11:20 to BOS 00:21, 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.