KL 863 then JL 6717 at Narita
Amsterdam → Tokyo → Seoul
Timetable, Tokyo time
07:10KL 863 from Amsterdam at the gate
12:10JL 6717 to Seoul leaves the gate
5 h apart on the timetable
The last days
KL 863 and JL 6717 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.