tailodds FORECAST
Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Boston → Seattle via Los Angeles: arrives on time 87%

  1. 06:21 BOS → 09:35 LAX
    UA 360 · United · 6h 14m · 92% on time, 0.0% cancelled
  2. 2h 24m layover in Los Angeles (LAX) · 90 min minimum on separate tickets
  3. 11:59 LAX → 14:54 SEA
    DL 1045 · Delta · 2h 55m · 89% on time, 0.6% cancelled

Total trip 11h 33m, scheduled departure to arrival (Seattle is 3 h behind Boston). Times are local. Both flew on 56 of the last 56 days.

Makes the connection99%The first flight arrived more than 54 minutes late on 1% of the days it flew: too late for the 90-minute minimum connection on a 2h 24m layover.
Arrives on time87%First flight not cancelled (0.0% are) × connection made (99%) × second flight not cancelled (0.6% are) and within 15 minutes (89%).
Total trip11h 33mBOS 06:21 to SEA 14:54, 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.