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

Dulles → Ontario via Seattle: arrives on time 81%

  1. 06:03 IAD → 08:48 SEA
    AS 409 · Alaska · 5h 45m · 63% on time, 1.8% cancelled
  2. 3h 05m layover in Seattle (SEA) · 90 min minimum on separate tickets
  3. 11:53 SEA → 14:39 ONT
    F9 2276 · Frontier · 2h 46m · 88% on time, 4.0% cancelled

Total trip 11h 36m, scheduled departure to arrival (Ontario is 3 h behind Dulles). Times are local. Both flew on 52 of the last 56 days.

Makes the connection98%The first flight arrived more than 95 minutes late on 2% of the days it flew: too late for the 90-minute minimum connection on a 3h 05m layover.
Arrives on time81%First flight not cancelled (1.8% are) × connection made (98%) × second flight not cancelled (4.0% are) and within 15 minutes (88%).
Total trip11h 36mIAD 06:03 to ONT 14:39, 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.