Flight Kansai International Airport departs from Osaka Kansai International Airport at 17:00 and arrives at Seoul Incheon International Airport at 18:55.
The flighttime is about 1h 55m. The distance travelled ("as the bird flies"): 1002 Km. So the average speed is roughly 523 Km.
The best day to arrive at Osaka is Sunday and it would be best to avoid Tuesday, as prices are on average 183.83% higher than on Sunday. (Average prices, based on 5021439 datapoints.)
We have a lot more statistics for flights OZ 113 and between Osaka and Seoul.