UA 217 then QF 3741 at San Francisco
Arcata → San Francisco → San Diego
Timetable, San Francisco time
09:13UA 217 from Arcata at the gate
07:04QF 3741 to San Diego leaves the gate
21 h 51 apart on the timetable, overnight
QF 3741 leaves 21 h 51 after UA 217 arrives on the timetable: more than half a day, so not a connection we count.