KE 852 then VJ 861 at Incheon
Beijing Capital → Seoul → Ho Chi Minh City
Timetable, Seoul time
21:55KE 852 from Beijing Capital at the gate
21:15VJ 861 to Ho Chi Minh City leaves the gate
23 h 20 apart on the timetable, overnight
VJ 861 leaves 23 h 20 after KE 852 arrives on the timetable: more than half a day, so not a connection we count.