UA 5599 then VA 8546 at San Francisco
Carlsbad → San Francisco → Los Angeles
Timetable, San Francisco time
15:30UA 5599 from Carlsbad at the gate
06:00VA 8546 to Los Angeles leaves the gate
14 h 30 apart on the timetable, overnight
VA 8546 leaves 14 h 30 after UA 5599 arrives on the timetable: more than half a day, so not a connection we count.