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

Seattle → Dulles via Salt Lake City: arrives on time 61%

  1. 13:30 SEA → 16:40 SLC
    DL 1120 · Delta · 2h 10m · 83% on time, 0.3% cancelled
  2. 50m layover in Salt Lake City (SLC) · 45 min minimum on one ticket
  3. 17:30 SLC → 23:30 IAD
    DL 847 · Delta · 4h 00m · 84% on time, 1.6% cancelled

Total trip 7h 00m, scheduled departure to arrival (Dulles is 3 h ahead of Seattle). Times are local. Both flew on 56 of the last 56 days.

Makes the connection74%The first flight arrived more than 5 minutes late on 26% of the days it flew: too late for the 45-minute minimum connection on a 50m layover.
Arrives on time61%First flight not cancelled (0.3% are) × connection made (74%) × second flight not cancelled (1.6% are) and within 15 minutes (84%).
Total trip7h 00mSEA 13:30 to IAD 23:30, 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.