UA 3772 then AV 2157 at San Francisco
Las Vegas → San Francisco → Los Angeles
Timetable, San Francisco time
22:05UA 3772 from Las Vegas at the gate
18:55AV 2157 to Los Angeles leaves the gate
20 h 50 apart on the timetable, overnight
AV 2157 leaves 20 h 50 after UA 3772 arrives on the timetable: more than half a day, so not a connection we count.