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

San Francisco → Boston via Seattle: arrives on time 75%

  1. 10:18 SFO → 12:27 SEA
    AS 656 · Alaska · 2h 09m · 57% on time, 3.4% cancelled
  2. 3h 09m layover in Seattle (SEA) · 45 min minimum on one ticket
  3. 15:36 SEA → 23:59 BOS
    AS 460 · Alaska · 5h 23m · 80% on time, 1.1% cancelled

Total trip 10h 41m, scheduled departure to arrival (Boston is 3 h ahead of San Francisco). Times are local. Both flew on 48 of the last 56 days.

Makes the connection98%The first flight arrived more than 144 minutes late on 2% of the days it flew: too late for the 45-minute minimum connection on a 3h 09m layover.
Arrives on time75%First flight not cancelled (3.4% are) × connection made (98%) × second flight not cancelled (1.1% are) and within 15 minutes (80%).
Total trip10h 41mSFO 10:18 to BOS 23:59, 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.