AV 6975 then UA 406 at San Francisco
Vancouver → San Francisco → Las Vegas
Timetable, San Francisco time
23:01AV 6975 from Vancouver at the gate
21:10UA 406 to Las Vegas leaves the gatealso AC 4025, LH 8940, NZ 9229
22 h 09 apart on the timetable, overnight
UA 406 leaves 22 h 09 after AV 6975 arrives on the timetable: more than half a day, so not a connection we count.