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

Seattle → Boston via Salt Lake City: arrives on time 87%

  1. 17:59 SEA → 21:09 SLC
    DL 1165 · Delta · 2h 10m · 81% on time, 0.7% cancelled
  2. 2h 22m layover in Salt Lake City (SLC) · 45 min minimum on one ticket
  3. 23:31 SLC → 06:05 BOS +1 day
    DL 696 · Delta · 4h 34m · 92% on time, 1.8% cancelled

Total trip 9h 06m, scheduled departure to arrival (Boston is 3 h ahead of Seattle). Times are local. Both flew on 55 of the last 56 days.

Makes the connection97%The first flight arrived more than 97 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 2h 22m layover.
Arrives on time87%First flight not cancelled (0.7% are) × connection made (97%) × second flight not cancelled (1.8% are) and within 15 minutes (92%).
Total trip9h 06mSEA 17:59 to BOS 06:05, 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.