AC 4121 then UA 1822 at San Francisco
Ontario → San Francisco → Los Angeles
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gatealso UA 5483
12:23UA 1822 to Los Angeles leaves the gatealso CA 7322, VA 8049, NZ 9253
18 h 33 apart on the timetable, overnight
UA 1822 leaves 18 h 33 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.