Flight Gimpo International Airport departs from Seoul Gimpo International Airport at 06:15 and arrives at Jeju City International Airport at 07:25.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 271 Km. So the average speed is roughly 232 Km.
The best day to arrive at Seoul is Wednesday and it would be best to avoid Thursday, as prices are on average 1198.73% higher than on Wednesday. (Average prices, based on 442270 datapoints.)
We have a lot more statistics for flights LJ 503 and between Seoul and Jeju City.
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