UA 3852 then UA 481 at San Francisco
Seoul → San Francisco → Raleigh-Durham
Timetable, San Francisco time
08:46UA 3852 from Seoul at the gate
07:25UA 481 to Raleigh-Durham leaves the gate
22 h 39 apart on the timetable, overnight
UA 481 leaves 22 h 39 after UA 3852 arrives on the timetable: more than half a day, so not a connection we count.