B6 633 then QR 3422 at San Francisco
Boston → San Francisco → San Diego
Timetable, San Francisco time
09:59B6 633 from Boston at the gate
07:04QR 3422 to San Diego leaves the gate
21 h 05 apart on the timetable, overnight
QR 3422 leaves 21 h 05 after B6 633 arrives on the timetable: more than half a day, so not a connection we count.