Flight Kansai International Airport departs from Osaka Kansai International Airport at 10:50 and arrives at Seoul Incheon International Airport at 12:40.
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 Wednesday and it would be best to avoid Sunday, as prices are on average 182.68% higher than on Wednesday. (Average prices, based on 6330674 datapoints.)
We have a lot more statistics for flights NH 6951 and between Osaka and Seoul.
