Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Ontario → Dulles via San Francisco: arrives on time 31%
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18:39 ONT → 20:07 SFOUA 5624 · United, flown by SkyWest · 1h 28m · 16% on time, 1.6% cancelled
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1h 23m layover in San Francisco (SFO) · 45 min minimum on one ticket
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21:30 SFO → 05:53 IAD +1 dayUA 357 · United · 5h 23m · 74% on time, 0.0% cancelled
Total trip 8h 14m, scheduled departure to arrival (Dulles is 3 h ahead of Ontario). Times are local. Both flew on 46 of the last 56 days.
Makes the connection43%The first flight arrived more than 38 minutes late on 57% of the days it flew: too late for the 45-minute minimum connection on a 1h 23m layover.
Arrives on time31%First flight not cancelled (1.6% are) × connection made (43%) × second flight not cancelled (0.0% are) and within 15 minutes (74%).
Total trip8h 14mONT 18:39 to IAD 05:53, 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.