tailodds FORECAST
Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Ontario → Dulles via Portland: arrives on time 87%

  1. 17:32 ONT → 19:49 PDX
    AS 2456 · Alaska, flown by Horizon · 2h 17m · 93% on time, 1.3% cancelled
  2. 3h 41m layover in Portland (PDX) · 90 min minimum on separate tickets
  3. 23:30 PDX → 07:32 IAD +1 day
    UA 498 · United · 5h 02m · 92% on time, 2.7% cancelled

Total trip 11h 00m, scheduled departure to arrival (Dulles is 3 h ahead of Ontario). Times are local. Both flew on 37 of the last 56 days.

Makes the connection99%The first flight arrived more than 131 minutes late on 1% of the days it flew: too late for the 90-minute minimum connection on a 3h 41m layover.
Arrives on time87%First flight not cancelled (1.3% are) × connection made (99%) × second flight not cancelled (2.7% are) and within 15 minutes (92%).
Total trip11h 00mONT 17:32 to IAD 07:32, 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.