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

Detroit → San Francisco via Boston: arrives on time 44%

  1. 14:01 DTW → 16:10 BOS
    DL 1171 · Delta · 2h 09m · 70% on time, 1.1% cancelled
  2. 55m layover in Boston (BOS) · 45 min minimum on one ticket
  3. 17:05 BOS → 20:51 SFO
    DL 1655 · Delta · 6h 48m · 69% on time, 1.8% cancelled

Total trip 9h 52m, scheduled departure to arrival (San Francisco is 3 h behind Detroit). Times are local. Both flew on 56 of the last 56 days.

Makes the connection65%The first flight arrived more than 10 minutes late on 35% of the days it flew: too late for the 45-minute minimum connection on a 55m layover.
Arrives on time44%First flight not cancelled (1.1% are) × connection made (65%) × second flight not cancelled (1.8% are) and within 15 minutes (69%).
Total trip9h 52mDTW 14:01 to SFO 20:51, 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.