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

Portland → Ontario via Seattle: arrives on time 36%

  1. 12:03 PDX → 13:03 SEA
    AS 3078 · Alaska, flown by SkyWest · 1h 00m · 86% on time, 1.9% cancelled
  2. 47m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 13:50 SEA → 16:30 ONT
    AS 571 · Alaska · 2h 40m · 52% on time, 2.2% cancelled

Total trip 4h 27m, scheduled departure to arrival. Times are local. Both flew on 45 of the last 56 days.

Makes the connection73%The first flight arrived more than 2 minutes late on 27% of the days it flew: too late for the 45-minute minimum connection on a 47m layover.
Arrives on time36%First flight not cancelled (1.9% are) × connection made (73%) × second flight not cancelled (2.2% are) and within 15 minutes (52%).
Total trip4h 27mPDX 12:03 to ONT 16:30, layover included

Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.

Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.