Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Ontario → Newark via San Francisco: arrives on time 17%
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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 08m layover in San Francisco (SFO) · 45 min minimum on one ticket
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21:15 SFO → 05:51 EWR +1 dayUA 698 · United · 5h 36m · 84% on time, 2.9% cancelled
Total trip 8h 12m, scheduled departure to arrival (Newark is 3 h ahead of Ontario). Times are local. Both flew on 46 of the last 56 days.
Makes the connection21%The first flight arrived more than 23 minutes late on 79% of the days it flew: too late for the 45-minute minimum connection on a 1h 08m layover.
Arrives on time17%First flight not cancelled (1.6% are) × connection made (21%) × second flight not cancelled (2.9% are) and within 15 minutes (84%).
Total trip8h 12mONT 18:39 to EWR 05:51, 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.