Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Ontario → Denver via San Francisco: arrives on time 78%
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06:00 ONT → 07:25 SFOUA 2363 · United · 1h 25m · 91% on time, 1.0% cancelled
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1h 06m layover in San Francisco (SFO) · 45 min minimum on one ticket
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08:31 SFO → 12:22 DENUA 2348 · United · 2h 51m · 84% on time, 0.6% cancelled
Total trip 5h 22m, scheduled departure to arrival (Denver is 1 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 21 minutes late on 6% of the days it flew: too late for the 45-minute minimum connection on a 1h 06m layover.
Arrives on time78%First flight not cancelled (1.0% are) × connection made (94%) × second flight not cancelled (0.6% are) and within 15 minutes (84%).
Total trip5h 22mONT 06:00 to DEN 12:22, 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.