BA 6444 then QR 3422 at San Francisco
Santa Ana → San Francisco → San Diego
Timetable, San Francisco time
18:33BA 6444 from Santa Ana at the gate
07:04QR 3422 to San Diego leaves the gate
12 h 31 apart on the timetable, overnight
QR 3422 leaves 12 h 31 after BA 6444 arrives on the timetable: more than half a day, so not a connection we count.