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

Dulles → Seattle via Atlanta: arrives on time 83%

  1. 06:00 IAD → 07:46 ATL
    DL 2127 · Delta · 1h 46m · 90% on time, 2.6% cancelled
  2. 3h 24m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 11:10 ATL → 13:38 SEA
    DL 648 · Delta · 5h 28m · 87% on time, 0.0% cancelled

Total trip 10h 38m, scheduled departure to arrival (Seattle is 3 h behind Dulles). Times are local. Both flew on 55 of the last 56 days.

Makes the connection98%The first flight arrived more than 159 minutes late on 2% of the days it flew: too late for the 45-minute minimum connection on a 3h 24m layover.
Arrives on time83%First flight not cancelled (2.6% are) × connection made (98%) × second flight not cancelled (0.0% are) and within 15 minutes (87%).
Total trip10h 38mIAD 06:00 to SEA 13:38, 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.