AC 4121 then AA 9310 at San Francisco
Ontario → San Francisco → Santa Ana
Timetable, San Francisco time
17:50AC 4121 from Ontario at the gate
13:29AA 9310 to Santa Ana leaves the gate
19 h 39 apart on the timetable, overnight
AA 9310 leaves 19 h 39 after AC 4121 arrives on the timetable: more than half a day, so not a connection we count.