Flight International Airport departs from Jeju City International Airport at 15:00 and arrives at Busan Gimhae International Airport at 16:05.
The flighttime is about 1h 05m. The distance travelled ("as the bird flies"): 296 Km. So the average speed is roughly 273 Km.
The best month to arrive at Jeju City is November and the most expensive month to fly is February. (Average prices, based on 268 datapoints.)
We have a lot more statistics for flights KE 1020 and between Jeju City and Busan.
NZD