Flight Kansai International Airport departs from Osaka Kansai International Airport at 07:40 and arrives at Seoul Incheon International Airport at 09:35.
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 Saturday and it would be best to avoid Tuesday, as prices are on average 85.97% higher than on Saturday. (Average prices, based on 5279246 datapoints.)
We have a lot more statistics for flights MM 701 and between Osaka and Seoul.