UA 733 then QF 3741 at San Francisco
Arcata → San Francisco → San Diego
Timetable, San Francisco time
07:18UA 733 from Arcata at the gate
07:04QF 3741 to San Diego leaves the gate
23 h 46 apart on the timetable, overnight
QF 3741 leaves 23 h 46 after UA 733 arrives on the timetable: more than half a day, so not a connection we count.