MF 850 then TW 250 at Narita
New York JFK → Tokyo → Seoul
Timetable, Tokyo time
17:15MF 850 from New York JFK at the gate
08:55TW 250 to Seoul leaves the gate
15 h 40 apart on the timetable, overnight
TW 250 leaves 15 h 40 after MF 850 arrives on the timetable: more than half a day, so not a connection we count.