K4 550 then VJ 823 at Narita
Chicago → Tokyo → Ho Chi Minh City
Timetable, Tokyo time
11:59K4 550 from Chicago at the gate
08:55VJ 823 to Ho Chi Minh City leaves the gate
20 h 56 apart on the timetable, overnight
VJ 823 leaves 20 h 56 after K4 550 arrives on the timetable: more than half a day, so not a connection we count.