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

Portland → Boston via Seattle: arrives on time 61%

  1. 21:30 PDX → 22:27 SEA
    AS 2421 · Alaska, flown by Horizon · 57m · 90% on time, 0.0% cancelled
  2. 51m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 23:18 SEA → 07:40 BOS +1 day
    AS 536 · Alaska · 5h 22m · 78% on time, 0.8% cancelled

Total trip 7h 10m, scheduled departure to arrival (Boston is 3 h ahead of Portland). Times are local. Both flew on 45 of the last 56 days.

Makes the connection79%The first flight arrived more than 6 minutes late on 21% of the days it flew: too late for the 45-minute minimum connection on a 51m layover.
Arrives on time61%First flight not cancelled (0.0% are) × connection made (79%) × second flight not cancelled (0.8% are) and within 15 minutes (78%).
Total trip7h 10mPDX 21:30 to BOS 07:40, 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.