Flight Gimpo International Airport departs from Seoul Gimpo International Airport at 14:05 and arrives at Jeju City International Airport at 15:20.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 271 Km. So the average speed is roughly 217 Km.
The best day to arrive at Seoul is Friday and it would be best to avoid Sunday, as prices are on average 156.72% higher than on Friday. (Average prices, based on 815226 datapoints.)
We have a lot more statistics for flights TW 717 and between Seoul and Jeju City.
