UA 6019 then QF 3741 at San Francisco
San Luis Obispo → San Francisco → San Diego
Timetable, San Francisco time
07:16UA 6019 from San Luis Obispo at the gate
07:04QF 3741 to San Diego leaves the gate
23 h 48 apart on the timetable, overnight
QF 3741 leaves 23 h 48 after UA 6019 arrives on the timetable: more than half a day, so not a connection we count.