Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Seattle → Houston via Dulles: arrives on time 79%
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23:20 SEA → 07:22 IADUA 264 · United · 5h 02m · 91% on time, 4.5% cancelled
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1h 18m layover in Dulles (IAD) · 45 min minimum on one ticket
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08:40 IAD → 10:59 IAH +1 dayUA 1524 · United · 3h 19m · 89% on time, 0.6% cancelled
Total trip 9h 39m, scheduled departure to arrival (Houston is 2 h ahead of Seattle). Times are local. Both flew on 41 of the last 56 days.
Makes the connection94%The first flight arrived more than 33 minutes late on 6% of the days it flew: too late for the 45-minute minimum connection on a 1h 18m layover.
Arrives on time79%First flight not cancelled (4.5% are) × connection made (94%) × second flight not cancelled (0.6% are) and within 15 minutes (89%).
Total trip9h 39mSEA 23:20 to IAH 10:59, 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.