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

Portland → Dulles via Detroit: arrives on time 65%

  1. 11:55 PDX → 19:08 DTW
    DL 2171 · Delta · 4h 13m · 83% on time, 0.0% cancelled
  2. 2h 30m layover in Detroit (DTW) · 45 min minimum on one ticket
  3. 21:38 DTW → 23:14 IAD
    DL 3988 · Delta, flown by SkyWest · 1h 36m · 65% on time, 0.0% cancelled

Total trip 8h 19m, scheduled departure to arrival (Dulles is 3 h ahead of Portland). Times are local. Both flew on 55 of the last 56 days.

Makes the connection99%The first flight arrived more than 105 minutes late on 1% of the days it flew: too late for the 45-minute minimum connection on a 2h 30m layover.
Arrives on time65%First flight not cancelled (0.0% are) × connection made (99%) × second flight not cancelled (0.0% are) and within 15 minutes (65%).
Total trip8h 19mPDX 11:55 to IAD 23:14, 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.