AV 2046 then BA 6428 at San Francisco
Arcata → San Francisco → San Diego
Timetable, San Francisco time
20:00AV 2046 from Arcata at the gate
17:00BA 6428 to San Diego leaves the gate
21 h apart on the timetable, overnight
BA 6428 leaves 21 h after AV 2046 arrives on the timetable: more than half a day, so not a connection we count.