Flight Incheon International Airport departs from Seoul Incheon International Airport at 06:55 and arrives at Osaka Kansai International Airport at 09:00.
The flighttime is about 2h 05m. The distance travelled ("as the bird flies"): 1002 Km. So the average speed is roughly 481 Km.
The best day to arrive at Seoul is Saturday and it would be best to avoid Friday, as prices are on average 150.7% higher than on Saturday. (Average prices, based on 2293644 datapoints.)
We have a lot more statistics for flights OZ 112 and between Seoul and Osaka.