AV 2046 then UA 3924 at San Francisco
Arcata → San Francisco → Los Angeles
Timetable, San Francisco time
20:00AV 2046 from Arcata at the gate
14:30UA 3924 to Los Angeles leaves the gate
18 h 30 apart on the timetable, overnight
UA 3924 leaves 18 h 30 after AV 2046 arrives on the timetable: more than half a day, so not a connection we count.