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

Salt Lake City → Boston via Seattle: arrives on time 50%

  1. 20:44 SLC → 22:05 SEA
    DL 2016 · Delta · 2h 21m · 46% on time, 1.2% cancelled
  2. 1h 10m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 23:15 SEA → 07:35 BOS +1 day
    DL 473 · Delta · 5h 20m · 82% on time, 1.4% cancelled

Total trip 8h 51m, scheduled departure to arrival (Boston is 2 h ahead of Salt Lake City). Times are local. Both flew on 56 of the last 56 days.

Makes the connection62%The first flight arrived more than 25 minutes late on 38% of the days it flew: too late for the 45-minute minimum connection on a 1h 10m layover.
Arrives on time50%First flight not cancelled (1.2% are) × connection made (62%) × second flight not cancelled (1.4% are) and within 15 minutes (82%).
Total trip8h 51mSLC 20:44 to BOS 07:35, 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.