KE 852 then VN 403 at Incheon
Beijing Capital → Seoul → Ho Chi Minh City
Timetable, Seoul time
21:55KE 852 from Beijing Capital at the gate
17:55VN 403 to Ho Chi Minh City leaves the gate
20 h apart on the timetable, overnight
VN 403 leaves 20 h after KE 852 arrives on the timetable: more than half a day, so not a connection we count.