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

Boston → San Antonio via Dulles: arrives on time 72%

  1. 14:15 BOS → 15:57 IAD
    UA 721 · United · 1h 42m · 78% on time, 2.9% cancelled
  2. 1h 48m layover in Dulles (IAD) · 45 min minimum on one ticket
  3. 17:45 IAD → 20:22 SAT
    UA 1869 · United · 3h 37m · 81% on time, 0.6% cancelled

Total trip 7h 07m, scheduled departure to arrival (San Antonio is 1 h behind Boston). Times are local. Both flew on 56 of the last 56 days.

Makes the connection91%The first flight arrived more than 63 minutes late on 9% of the days it flew: too late for the 45-minute minimum connection on a 1h 48m layover.
Arrives on time72%First flight not cancelled (2.9% are) × connection made (91%) × second flight not cancelled (0.6% are) and within 15 minutes (81%).
Total trip7h 07mBOS 14:15 to SAT 20:22, 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.