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

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

  1. 11:15 BOS → 14:24 SLC
    DL 464 · Delta · 5h 09m · 78% on time, 0.8% cancelled
  2. 50m layover in Salt Lake City (SLC) · 45 min minimum on one ticket
  3. 15:14 SLC → 16:30 SEA
    DL 2817 · Delta · 2h 16m · 77% on time, 0.3% cancelled

Total trip 8h 15m, scheduled departure to arrival (Seattle is 3 h behind Boston). Times are local. Both flew on 56 of the last 56 days.

Makes the connection66%The first flight arrived more than 5 minutes late on 34% of the days it flew: too late for the 45-minute minimum connection on a 50m layover.
Arrives on time50%First flight not cancelled (0.8% are) × connection made (66%) × second flight not cancelled (0.3% are) and within 15 minutes (77%).
Total trip8h 15mBOS 11:15 to SEA 16:30, 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.