Flight Incheon International Airport departs from Seoul Incheon International Airport at 16:10 and arrives at Osaka Kansai International Airport at 17:50.
The flighttime is about 1h 40m. The distance travelled ("as the bird flies"): 1002 Km. So the average speed is roughly 601 Km.
The best day to arrive at Seoul is Saturday and it would be best to avoid Wednesday, as prices are on average 185.58% higher than on Saturday. (Average prices, based on 2256142 datapoints.)
We have a lot more statistics for flights OZ 118 and between Seoul and Osaka.