KL 855 then KE 459 at Incheon
Amsterdam → Seoul → Da Nang
Timetable, Seoul time
19:10KL 855 from Amsterdam at the gate
18:40KE 459 to Da Nang leaves the gate
23 h 30 apart on the timetable, overnight
KE 459 leaves 23 h 30 after KL 855 arrives on the timetable: more than half a day, so not a connection we count.