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

Dulles → Seattle via Detroit: arrives on time 48%

  1. 17:29 IAD → 19:07 DTW
    DL 1787 · Delta · 1h 38m · 76% on time, 3.8% cancelled
  2. 1h 27m layover in Detroit (DTW) · 45 min minimum on one ticket
  3. 20:34 DTW → 22:34 SEA
    DL 565 · Delta · 5h 00m · 64% on time, 0.9% cancelled

Total trip 8h 05m, scheduled departure to arrival (Seattle is 3 h behind Dulles). Times are local. Both flew on 48 of the last 56 days.

Makes the connection80%The first flight arrived more than 42 minutes late on 20% of the days it flew: too late for the 45-minute minimum connection on a 1h 27m layover.
Arrives on time48%First flight not cancelled (3.8% are) × connection made (80%) × second flight not cancelled (0.9% are) and within 15 minutes (64%).
Total trip8h 05mIAD 17:29 to SEA 22:34, 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.