UA 3852 then LY 4489 at San Francisco
Seoul → San Francisco → Los Angeles
Timetable, San Francisco time
08:46UA 3852 from Seoul at the gate
07:05LY 4489 to Los Angeles leaves the gate
22 h 19 apart on the timetable, overnight
LY 4489 leaves 22 h 19 after UA 3852 arrives on the timetable: more than half a day, so not a connection we count.