KE 852 then WE 201 at Incheon
Beijing Capital → Seoul → Da Nang
Timetable, Seoul time
21:55KE 852 from Beijing Capital at the gate
18:15WE 201 to Da Nang leaves the gate
20 h 20 apart on the timetable, overnight
WE 201 leaves 20 h 20 after KE 852 arrives on the timetable: more than half a day, so not a connection we count.