UA 892 then VA 8562 at San Francisco
Seoul → San Francisco → Las Vegas
Timetable, San Francisco time
11:45UA 892 from Seoul at the gatealso OZ 6614
08:35VA 8562 to Las Vegas leaves the gate
20 h 50 apart on the timetable, overnight
VA 8562 leaves 20 h 50 after UA 892 arrives on the timetable: more than half a day, so not a connection we count.