AV 6975 then AA 7561 at San Francisco
Vancouver → San Francisco → Las Vegas
Timetable, San Francisco time
23:01AV 6975 from Vancouver at the gate
19:19AA 7561 to Las Vegas leaves the gate
20 h 18 apart on the timetable, overnight
AA 7561 leaves 20 h 18 after AV 6975 arrives on the timetable: more than half a day, so not a connection we count.