UA 3852 then PR 3879 at San Francisco
Seoul → San Francisco → Los Angeles
Timetable, San Francisco time
08:46UA 3852 from Seoul at the gate
07:16PR 3879 to Los Angeles leaves the gate
22 h 30 apart on the timetable, overnight
PR 3879 leaves 22 h 30 after UA 3852 arrives on the timetable: more than half a day, so not a connection we count.