Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Ontario → Washington via Houston: arrives on time 68%
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05:45 ONT → 11:04 IAHUA 1936 · United · 3h 19m · 91% on time, 0.5% cancelled
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3h 16m layover in Houston (IAH) · 45 min minimum on one ticket
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14:20 IAH → 18:31 DCAUA 625 · United · 3h 11m · 69% on time, 0.8% cancelled
Total trip 9h 46m, scheduled departure to arrival (Washington is 3 h ahead of Ontario). Times are local. Both flew on 47 of the last 56 days.
Makes the connection99%The first flight arrived more than 151 minutes late on 1% of the days it flew: too late for the 45-minute minimum connection on a 3h 16m layover.
Arrives on time68%First flight not cancelled (0.5% are) × connection made (99%) × second flight not cancelled (0.8% are) and within 15 minutes (69%).
Total trip9h 46mONT 05:45 to DCA 18:31, 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.