AC 3344 then QR 3422 at San Francisco
Portland (Oregon) → San Francisco → San Diego
Timetable, San Francisco time
12:58AC 3344 from Portland (Oregon) at the gate
07:04QR 3422 to San Diego leaves the gate
18 h 06 apart on the timetable, overnight
QR 3422 leaves 18 h 06 after AC 3344 arrives on the timetable: more than half a day, so not a connection we count.