Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Houston → Dulles via Denver: arrives on time 87%
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19:10 HOU → 20:55 DENWN 4639 · Southwest · 2h 45m · 72% on time, 0.0% cancelled
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3h 04m layover in Denver (DEN) · 90 min minimum on separate tickets
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23:59 DEN → 05:27 IAD +1 dayUA 1924 · United · 3h 28m · 94% on time, 0.6% cancelled
Total trip 9h 17m, scheduled departure to arrival (Dulles is 1 h ahead of Houston). Times are local. Both flew on 55 of the last 56 days.
Makes the connection93%The first flight arrived more than 94 minutes late on 7% of the days it flew: too late for the 90-minute minimum connection on a 3h 04m layover.
Arrives on time87%First flight not cancelled (0.0% are) × connection made (93%) × second flight not cancelled (0.6% are) and within 15 minutes (94%).
Total trip9h 17mHOU 19:10 to IAD 05:27, 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.