K4 556 then KE 82 at Narita
Chicago → Tokyo → Seoul
Timetable, Tokyo time
11:53K4 556 from Chicago at the gate
19:25KE 82 to Seoul leaves the gate
7 h 32 apart on the timetable
The last days
K4 556 and KE 82 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.