UA 3772 then BA 6428 at San Francisco
Las Vegas → San Francisco → San Diego
Timetable, San Francisco time
22:05UA 3772 from Las Vegas at the gate
17:00BA 6428 to San Diego leaves the gate
18 h 55 apart on the timetable, overnight
BA 6428 leaves 18 h 55 after UA 3772 arrives on the timetable: more than half a day, so not a connection we count.