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

Portland → Ontario via Seattle: arrives on time 76%

  1. 12:23 PDX → 13:34 SEA
    DL 3802 · Delta, flown by SkyWest · 1h 11m · 87% on time, 0.9% cancelled
  2. 1h 01m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 14:35 SEA → 17:19 ONT
    DL 4031 · Delta, flown by SkyWest · 2h 44m · 88% on time, 0.3% cancelled

Total trip 4h 56m, scheduled departure to arrival. Times are local. Both flew on 55 of the last 56 days.

Makes the connection87%The first flight arrived more than 16 minutes late on 13% of the days it flew: too late for the 45-minute minimum connection on a 1h 01m layover.
Arrives on time76%First flight not cancelled (0.9% are) × connection made (87%) × second flight not cancelled (0.3% are) and within 15 minutes (88%).
Total trip4h 56mPDX 12:23 to ONT 17:19, 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.