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

Portland → Dulles via Seattle: arrives on time 76%

  1. 07:19 PDX → 08:20 SEA
    AS 2420 · Alaska, flown by Horizon · 1h 01m · 98% on time, 1.9% cancelled
  2. 53m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 09:13 SEA → 17:11 IAD
    AS 737 · Alaska · 4h 58m · 84% on time, 0.5% cancelled

Total trip 6h 52m, scheduled departure to arrival (Dulles is 3 h ahead of Portland). Times are local. Both flew on 52 of the last 56 days.

Makes the connection92%The first flight arrived more than 8 minutes late on 8% of the days it flew: too late for the 45-minute minimum connection on a 53m layover.
Arrives on time76%First flight not cancelled (1.9% are) × connection made (92%) × second flight not cancelled (0.5% are) and within 15 minutes (84%).
Total trip6h 52mPDX 07:19 to IAD 17:11, 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.