Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Ontario → Dulles via San Francisco: arrives on time 62%
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13:50 ONT → 15:15 SFOUA 1375 · United · 1h 25m · 57% on time, 0.0% cancelled
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1h 19m layover in San Francisco (SFO) · 45 min minimum on one ticket
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16:34 SFO → 00:55 IAD +1 dayUA 1453 · United · 5h 21m · 87% on time, 0.4% cancelled
Total trip 8h 05m, scheduled departure to arrival (Dulles is 3 h ahead of Ontario). Times are local. Both flew on 55 of the last 56 days.
Makes the connection72%The first flight arrived more than 34 minutes late on 28% of the days it flew: too late for the 45-minute minimum connection on a 1h 19m layover.
Arrives on time62%First flight not cancelled (0.0% are) × connection made (72%) × second flight not cancelled (0.4% are) and within 15 minutes (87%).
Total trip8h 05mONT 13:50 to IAD 00:55, layover included
Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.