Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Houston via Charleston: arrives on time 81%
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08:25 IAD → 10:11 CHSUA 1108 · United · 1h 46m · 94% on time, 0.0% cancelled
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1h 49m layover in Charleston (CHS) · 90 min minimum on separate tickets
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12:00 CHS → 13:30 HOUWN 356 · Southwest · 2h 30m · 85% on time, 0.0% cancelled
Total trip 6h 05m, scheduled departure to arrival (Houston is 1 h behind Dulles). Times are local. Both flew on 24 of the last 56 days.
Makes the connection95%The first flight arrived more than 19 minutes late on 5% of the days it flew: too late for the 90-minute minimum connection on a 1h 49m layover.
Arrives on time81%First flight not cancelled (0.0% are) × connection made (95%) × second flight not cancelled (0.0% are) and within 15 minutes (85%).
Total trip6h 05mIAD 08:25 to HOU 13:30, 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.