AF 281 then JL 6717 at Narita
Tokyo → Tokyo → Seoul
Timetable, Tokyo time
10:30AF 281 from Tokyo at the gate
12:10JL 6717 to Seoul leaves the gate
1 h 40 apart on the timetable
The last days
AF 281 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.