KE 852 then UA 892 at Incheon
Beijing Capital → Seoul → San Francisco
Timetable, Seoul time
21:55KE 852 from Beijing Capital at the gate
18:00UA 892 to San Francisco leaves the gate
20 h 05 apart on the timetable, overnight
UA 892 leaves 20 h 05 after KE 852 arrives on the timetable: more than half a day, so not a connection we count.