AC 4683 then QR 3391 at San Francisco
Spokane → San Francisco → San Diego
Timetable, San Francisco time
15:35AC 4683 from Spokane at the gate
10:29QR 3391 to San Diego leaves the gatealso QF 3748
18 h 54 apart on the timetable, overnight
QR 3391 leaves 18 h 54 after AC 4683 arrives on the timetable: more than half a day, so not a connection we count.