Flight Kansai International Airport departs from Osaka Kansai International Airport at 09:10 and arrives at Seoul Incheon International Airport at 11:00.
The flighttime is about 1h 50m. The distance travelled ("as the bird flies"): 1002 Km. So the average speed is roughly 547 Km.
The best day to arrive at Osaka is Sunday and it would be best to avoid Saturday, as prices are on average 178.49% higher than on Sunday. (Average prices, based on 5021408 datapoints.)
We have a lot more statistics for flights OZ 115 and between Osaka and Seoul.