Flight Kansai International Airport departs from Osaka Kansai International Airport at 19:05 and arrives at Seoul Incheon International Airport at 21:10.
The flighttime is about 2h 05m. The distance travelled ("as the bird flies"): 1002 Km. So the average speed is roughly 481 Km.
The best day to arrive at Osaka is Saturday and it would be best to avoid Wednesday, as prices are on average 408.39% higher than on Saturday. (Average prices, based on 6279308 datapoints.)
We have a lot more statistics for flights OZ 117 and between Osaka and Seoul.