Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Houston via Austin: arrives on time 68%
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08:30 IAD → 10:56 AUSUA 637 · United · 3h 26m · 93% on time, 0.8% cancelled
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1h 19m layover in Austin (AUS) · 45 min minimum on one ticket
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12:15 AUS → 13:20 IAHUA 1747 · United · 1h 05m · 71% on time, 0.3% cancelled
Total trip 5h 50m, scheduled departure to arrival (Houston is 1 h behind Dulles). Times are local. Both flew on 32 of the last 56 days.
Makes the connection97%The first flight arrived more than 34 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 1h 19m layover.
Arrives on time68%First flight not cancelled (0.8% are) × connection made (97%) × second flight not cancelled (0.3% are) and within 15 minutes (71%).
Total trip5h 50mIAD 08:30 to IAH 13:20, 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.