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

Boston → Denver via Dulles: arrives on time 91%

  1. 05:45 BOS → 07:23 IAD
    UA 1734 · United · 1h 38m · 97% on time, 2.3% cancelled
  2. 2h 50m layover in Dulles (IAD) · 45 min minimum on one ticket
  3. 10:13 IAD → 12:05 DEN
    UA 1865 · United · 3h 52m · 93% on time, 0.0% cancelled

Total trip 8h 20m, scheduled departure to arrival (Denver is 2 h behind Boston). Times are local. Both flew on 56 of the last 56 days.

Makes the connection100%The first flight arrived more than 125 minutes late on <1% of the days it flew: too late for the 45-minute minimum connection on a 2h 50m layover.
Arrives on time91%First flight not cancelled (2.3% are) × connection made (100%) × second flight not cancelled (0.0% are) and within 15 minutes (93%).
Total trip8h 20mBOS 05:45 to DEN 12:05, 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.