UA 648 then QR 3422 at San Francisco
Newark → San Francisco → San Diego
Timetable, San Francisco time
09:30UA 648 from Newark at the gatealso TP 8490, VA 8516, NZ 9121
07:04QR 3422 to San Diego leaves the gate
21 h 34 apart on the timetable, overnight
QR 3422 leaves 21 h 34 after UA 648 arrives on the timetable: more than half a day, so not a connection we count.