Flight Incheon International Airport departs from Seoul Incheon International Airport at 13:35 and arrives at Osaka Kansai International Airport at 15:20.
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 Friday and it would be best to avoid Sunday, as prices are on average 206.5% higher than on Friday. (Average prices, based on 1950018 datapoints.)
We have a lot more statistics for flights 7C 1308 and between Seoul and Osaka.