Flight Incheon International Airport departs from Seoul Incheon International Airport at 18:05 and arrives at Fukuoka Fukuoka Airport at 19:35.
The flighttime is about 1h 30m. The distance travelled ("as the bird flies"): 518 Km. So the average speed is roughly 345 Km.
The best day to arrive at Seoul is Wednesday and it would be best to avoid Saturday, as prices are on average 556.19% higher than on Wednesday. (Average prices, based on 721982 datapoints.)
We have a lot more statistics for flights TW 295 and between Seoul and Fukuoka.
