UA 571 then VA 8562 at San Francisco
Atlanta → San Francisco → Las Vegas
Timetable, San Francisco time
11:24UA 571 from Atlanta at the gatealso VA 8403, NZ 9005
08:35VA 8562 to Las Vegas leaves the gate
21 h 11 apart on the timetable, overnight
VA 8562 leaves 21 h 11 after UA 571 arrives on the timetable: more than half a day, so not a connection we count.