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

Portland → Billings via Seattle: arrives on time 83%

  1. 17:50 PDX → 19:05 SEA
    DL 3918 · Delta, flown by SkyWest · 1h 15m · 86% on time, 0.3% cancelled
  2. 1h 54m layover in Seattle (SEA) · 90 min minimum on separate tickets
  3. 20:59 SEA → 23:51 BIL
    AS 2457 · Alaska, flown by Horizon · 1h 52m · 92% on time, 1.0% cancelled

Total trip 5h 01m, scheduled departure to arrival (Billings is 1 h ahead of Portland). Times are local. Both flew on 51 of the last 56 days.

Makes the connection91%The first flight arrived more than 24 minutes late on 9% of the days it flew: too late for the 90-minute minimum connection on a 1h 54m layover.
Arrives on time83%First flight not cancelled (0.3% are) × connection made (91%) × second flight not cancelled (1.0% are) and within 15 minutes (92%).
Total trip5h 01mPDX 17:50 to BIL 23:51, 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.