Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Antonio → Boston via Dulles: arrives on time 78%
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07:00 SAT → 11:27 IADUA 471 · United · 3h 27m · 95% on time, 0.7% cancelled
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1h 28m layover in Dulles (IAD) · 45 min minimum on one ticket
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12:55 IAD → 14:40 BOSUA 1392 · United · 1h 45m · 82% on time, 1.3% cancelled
Total trip 6h 40m, scheduled departure to arrival (Boston is 1 h ahead of San Antonio). Times are local. Both flew on 56 of the last 56 days.
Makes the connection97%The first flight arrived more than 43 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 1h 28m layover.
Arrives on time78%First flight not cancelled (0.7% are) × connection made (97%) × second flight not cancelled (1.3% are) and within 15 minutes (82%).
Total trip6h 40mSAT 07:00 to BOS 14:40, 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.