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

Dulles → Portland via Detroit: arrives on time 42%

  1. 17:29 IAD → 19:07 DTW
    DL 1787 · Delta · 1h 38m · 76% on time, 3.8% cancelled
  2. 57m layover in Detroit (DTW) · 45 min minimum on one ticket
  3. 20:04 DTW → 21:50 PDX
    DL 913 · Delta · 4h 45m · 60% on time, 1.8% cancelled

Total trip 7h 20m, scheduled departure to arrival (Portland is 3 h behind Dulles). Times are local. Both flew on 30 of the last 56 days.

Makes the connection74%The first flight arrived more than 12 minutes late on 26% of the days it flew: too late for the 45-minute minimum connection on a 57m layover.
Arrives on time42%First flight not cancelled (3.8% are) × connection made (74%) × second flight not cancelled (1.8% are) and within 15 minutes (60%).
Total trip7h 20mIAD 17:29 to PDX 21:50, 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.