Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Boston → San Francisco via Dulles: arrives on time 80%
-
09:25 BOS → 11:07 IADUA 2098 · United · 1h 42m · 91% on time, 2.0% cancelled
-
3h 44m layover in Dulles (IAD) · 45 min minimum on one ticket
-
14:51 IAD → 17:38 SFOUA 2862 · United · 5h 47m · 82% on time, 0.3% cancelled
Total trip 11h 13m, scheduled departure to arrival (San Francisco 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 179 minutes late on 1% of the days it flew: too late for the 45-minute minimum connection on a 3h 44m layover.
Arrives on time80%First flight not cancelled (2.0% are) × connection made (99%) × second flight not cancelled (0.3% are) and within 15 minutes (82%).
Total trip11h 13mBOS 09:25 to SFO 17:38, 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.