AC 4121 then JL 7553 at San Francisco
Ontario → San Francisco → Los Angeles
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
07:00JL 7553 to Los Angeles leaves the gate
13 h 10 apart on the timetable, overnight
JL 7553 leaves 13 h 10 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.