Flight Incheon International Airport departs from Seoul Incheon International Airport at 21:00 and arrives at Osaka Kansai International Airport at 22:45.
The flighttime is about 1h 45m. The distance travelled ("as the bird flies"): 1002 Km. So the average speed is roughly 573 Km.
The best day to arrive at Seoul is Monday and it would be best to avoid Saturday, as prices are on average 103.51% higher than on Monday. (Average prices, based on 1946796 datapoints.)
We have a lot more statistics for flights MM 710 and between Seoul and Osaka.