Flight International Airport departs from Jeju City International Airport at 16:05 and arrives at Kuala Lumpur Kuala Lumpur International Airport at 21:15.
The flighttime is about 6h 10m. The distance travelled ("as the bird flies"): 3004 Km. So the average speed is roughly 487 Km.
There is an 1 hour time difference between Jeju City and Kuala Lumpur