AC 4121 then AS 1330 at San Francisco
Ontario → San Francisco → San Diego
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
17:00AS 1330 to San Diego leaves the gatealso AA 7441
23 h 10 apart on the timetable, overnight
AS 1330 leaves 23 h 10 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.