Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Ontario via San Francisco: arrives on time 74%
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06:30 IAD → 09:12 SFOUA 1095 · United · 5h 42m · 88% on time, 0.0% cancelled
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1h 28m layover in San Francisco (SFO) · 45 min minimum on one ticket
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10:40 SFO → 12:12 ONTUA 2661 · United · 1h 32m · 78% on time, 0.0% cancelled
Total trip 8h 42m, scheduled departure to arrival (Ontario is 3 h behind Dulles). Times are local. Both flew on 56 of the last 56 days.
Makes the connection95%The first flight arrived more than 43 minutes late on 5% of the days it flew: too late for the 45-minute minimum connection on a 1h 28m layover.
Arrives on time74%First flight not cancelled (0.0% are) × connection made (95%) × second flight not cancelled (0.0% are) and within 15 minutes (78%).
Total trip8h 42mIAD 06:30 to ONT 12:12, 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.