Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Ontario → Dulles via Houston: arrives on time 77%
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05:45 ONT → 11:04 IAHUA 1936 · United · 3h 19m · 91% on time, 0.5% cancelled
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1h 09m layover in Houston (IAH) · 45 min minimum on one ticket
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12:13 IAH → 16:30 IADUA 2366 · United · 3h 17m · 82% on time, 0.3% cancelled
Total trip 7h 45m, scheduled departure to arrival (Dulles is 3 h ahead of Ontario). Times are local. Both flew on 56 of the last 56 days.
Makes the connection94%The first flight arrived more than 24 minutes late on 6% of the days it flew: too late for the 45-minute minimum connection on a 1h 09m layover.
Arrives on time77%First flight not cancelled (0.5% are) × connection made (94%) × second flight not cancelled (0.3% are) and within 15 minutes (82%).
Total trip7h 45mONT 05:45 to IAD 16:30, 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.