UA 3852 then AC 4414 at San Francisco
Seoul → San Francisco → Reno
Timetable, San Francisco time
08:46UA 3852 from Seoul at the gate
08:10AC 4414 to Reno leaves the gatealso UA 5394, NZ 9597
23 h 24 apart on the timetable, overnight
AC 4414 leaves 23 h 24 after UA 3852 arrives on the timetable: more than half a day, so not a connection we count.