UA 3772 then UA 580 at San Francisco
Las Vegas → San Francisco → Los Angeles
Timetable, San Francisco time
22:05UA 3772 from Las Vegas at the gate
21:20UA 580 to Los Angeles leaves the gatealso CM 1067, VA 8560, NZ 9258
23 h 15 apart on the timetable, overnight
UA 580 leaves 23 h 15 after UA 3772 arrives on the timetable: more than half a day, so not a connection we count.