UA 3903 then CM 1884 at San Francisco
Seoul → San Francisco → Las Vegas
Timetable, San Francisco time
08:46UA 3903 from Seoul at the gate
22:59CM 1884 to Las Vegas leaves the gatealso UA 2400, AC 4123, LH 9212, NZ 9225
14 h 13 apart on the timetable
CM 1884 leaves 14 h 13 after UA 3903 arrives on the timetable: more than half a day, so not a connection we count.