GK 504 then GK 7303 at Narita
Fukuoka → Tokyo → Naha
Timetable, Tokyo time
12:25GK 504 from Fukuoka at the gate
16:10GK 7303 to Naha leaves the gate
3 h 45 apart on the timetable
The last days
GK 504 and GK 7303 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.