Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Newark → Ontario via San Francisco: arrives on time 73%
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16:00 EWR → 19:18 SFOUA 2004 · United · 6h 18m · 78% on time, 0.0% cancelled
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1h 42m layover in San Francisco (SFO) · 45 min minimum on one ticket
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21:00 SFO → 22:37 ONTUA 552 · United · 1h 37m · 83% on time, 0.5% cancelled
Total trip 9h 37m, scheduled departure to arrival (Ontario is 3 h behind Newark). Times are local. Both flew on 0 of the last 56 days, too few to list among the best connections.
Makes the connection88%The first flight arrived more than 57 minutes late on 12% of the days it flew: too late for the 45-minute minimum connection on a 1h 42m layover.
Arrives on time73%First flight not cancelled (0.0% are) × connection made (88%) × second flight not cancelled (0.5% are) and within 15 minutes (83%).
Total trip9h 37mEWR 16:00 to ONT 22:37, 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.