JL 6750 then VJ 823 at Narita
Seoul → Tokyo → Ho Chi Minh City
Timetable, Tokyo time
09:33JL 6750 from Seoul at the gate
08:55VJ 823 to Ho Chi Minh City leaves the gate
23 h 22 apart on the timetable, overnight
VJ 823 leaves 23 h 22 after JL 6750 arrives on the timetable: more than half a day, so not a connection we count.