Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Houston via Boston: arrives on time 87%
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08:35 IAD → 10:20 BOSUA 641 · United · 1h 45m · 92% on time, 1.5% cancelled
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3h 17m layover in Boston (BOS) · 45 min minimum on one ticket
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13:37 BOS → 16:57 IAHUA 1976 · United · 4h 20m · 90% on time, 1.4% cancelled
Total trip 9h 22m, scheduled departure to arrival (Houston is 1 h behind Dulles). Times are local. Both flew on 54 of the last 56 days.
Makes the connection100%The first flight arrived more than 152 minutes late on <1% of the days it flew: too late for the 45-minute minimum connection on a 3h 17m layover.
Arrives on time87%First flight not cancelled (1.5% are) × connection made (100%) × second flight not cancelled (1.4% are) and within 15 minutes (90%).
Total trip9h 22mIAD 08:35 to IAH 16:57, 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.