Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Newark → Ontario via San Francisco: arrives on time 46%
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11:50 EWR → 15:01 SFOUA 1343 · United · 6h 11m · 68% on time, 1.9% cancelled
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1h 16m layover in San Francisco (SFO) · 45 min minimum on one ticket
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16:17 SFO → 17:54 ONTUA 5613 · United, flown by SkyWest · 1h 37m · 67% on time, 3.8% cancelled
Total trip 9h 04m, scheduled departure to arrival (Ontario is 3 h behind Newark). Times are local. Both flew on 46 of the last 56 days.
Makes the connection73%The first flight arrived more than 31 minutes late on 27% of the days it flew: too late for the 45-minute minimum connection on a 1h 16m layover.
Arrives on time46%First flight not cancelled (1.9% are) × connection made (73%) × second flight not cancelled (3.8% are) and within 15 minutes (67%).
Total trip9h 04mEWR 11:50 to ONT 17:54, 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.