WN 426 then QF 3748 at San Francisco
Austin → San Francisco → San Diego
Timetable, San Francisco time
12:30WN 426 from Austin at the gate
08:20QF 3748 to San Diego leaves the gate
19 h 50 apart on the timetable, overnight
QF 3748 leaves 19 h 50 after WN 426 arrives on the timetable: more than half a day, so not a connection we count.