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

Boston → Portland via Denver: arrives on time 88%

  1. 07:45 BOS → 10:19 DEN
    DL 499 · Delta · 4h 34m · 85% on time, 1.6% cancelled
  2. 3h 08m layover in Denver (DEN) · 90 min minimum on separate tickets
  3. 13:27 DEN → 15:13 PDX
    UA 2455 · United · 2h 46m · 90% on time, 0.0% cancelled

Total trip 10h 28m, scheduled departure to arrival (Portland 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 98 minutes late on 1% of the days it flew: too late for the 90-minute minimum connection on a 3h 08m layover.
Arrives on time88%First flight not cancelled (1.6% are) × connection made (99%) × second flight not cancelled (0.0% are) and within 15 minutes (90%).
Total trip10h 28mBOS 07:45 to PDX 15:13, 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.