Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Ontario via Denver: arrives on time 88%
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06:30 IAD → 08:22 DENUA 2031 · United · 3h 52m · 100% on time, 0.0% cancelled
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3h 03m layover in Denver (DEN) · 45 min minimum on one ticket
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11:25 DEN → 12:47 ONTUA 430 · United · 2h 22m · 88% on time, 0.0% cancelled
Total trip 9h 17m, scheduled departure to arrival (Ontario is 3 h behind Dulles). Times are local. Both flew on 37 of the last 56 days.
Makes the connection100%The first flight arrived more than 138 minutes late on 0% of the days it flew: too late for the 45-minute minimum connection on a 3h 03m layover.
Arrives on time88%First flight not cancelled (0.0% are) × connection made (100%) × second flight not cancelled (0.0% are) and within 15 minutes (88%).
Total trip9h 17mIAD 06:30 to ONT 12:47, 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.