AC 4121 then UA 1284 at San Francisco
Ontario → San Francisco → Newark
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
14:00UA 1284 to Newark leaves the gatealso NZ 9105
20 h 10 apart on the timetable, overnight
UA 1284 leaves 20 h 10 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.