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 78%

  1. 05:30 SEA → 08:30 SLC
    DL 1128 · Delta · 2h 00m · 94% on time, 0.5% cancelled
  2. 1h 20m layover in Salt Lake City (SLC) · 45 min minimum on one ticket
  3. 09:50 SLC → 16:37 BOS
    DL 657 · Delta · 4h 47m · 82% on time, 1.1% cancelled

Total trip 8h 07m, scheduled departure to arrival (Boston is 3 h ahead of Seattle). Times are local. Both flew on 56 of the last 56 days.

Makes the connection97%The first flight arrived more than 35 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 1h 20m layover.
Arrives on time78%First flight not cancelled (0.5% are) × connection made (97%) × second flight not cancelled (1.1% are) and within 15 minutes (82%).
Total trip8h 07mSEA 05:30 to BOS 16:37, 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.