Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Raleigh/Durham via Houston: arrives on time 72%
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08:40 IAD → 10:59 IAHUA 1524 · United · 3h 19m · 89% on time, 0.6% cancelled
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1h 04m layover in Houston (IAH) · 45 min minimum on one ticket
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12:03 IAH → 15:55 RDUUA 2196 · United · 2h 52m · 83% on time, 2.1% cancelled
Total trip 7h 15m, scheduled departure to arrival. Times are local. Both flew on 27 of the last 56 days.
Makes the connection90%The first flight arrived more than 19 minutes late on 10% of the days it flew: too late for the 45-minute minimum connection on a 1h 04m layover.
Arrives on time72%First flight not cancelled (0.6% are) × connection made (90%) × second flight not cancelled (2.1% are) and within 15 minutes (83%).
Total trip7h 15mIAD 08:40 to RDU 15:55, 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.