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

Seattle → Dulles via Atlanta: arrives on time 69%

  1. 22:58 SEA → 06:45 ATL
    DL 409 · Delta · 4h 47m · 83% on time, 0.0% cancelled
  2. 58m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 07:43 ATL → 09:26 IAD +1 day
    DL 1324 · Delta · 1h 45m · 90% on time, 4.1% cancelled

Total trip 7h 30m, scheduled departure to arrival (Dulles is 3 h ahead of Seattle). Times are local. Both flew on 23 of the last 56 days.

Makes the connection80%The first flight arrived more than 13 minutes late on 20% of the days it flew: too late for the 45-minute minimum connection on a 58m layover.
Arrives on time69%First flight not cancelled (0.0% are) × connection made (80%) × second flight not cancelled (4.1% are) and within 15 minutes (90%).
Total trip7h 30mSEA 22:58 to IAD 09:26, 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.