NH 930 then KJ 197 at Narita
Hangzhou → Tokyo → Seoul
Timetable, Tokyo time
17:55NH 930 from Hangzhou at the gate
21:17KJ 197 to Seoul leaves the gate
3 h 22 apart on the timetable
The last days
NH 930 and KJ 197 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.