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 Wednesday and it would be best to avoid Sunday, as prices are on average 225.86% higher than on Wednesday. (Average prices, based on 6335891 datapoints.)
We have a lot more statistics for flights NH 6953 and between Osaka and Seoul.
