Flight Incheon International Airport departs from Seoul Incheon International Airport at 17:40 and arrives at Shanghai Pudong International Airport at 18:55.
The flighttime is about 2h 15m. The distance travelled ("as the bird flies"): 649 Km. So the average speed is roughly 288 Km.
There is an 1 hour time difference between Seoul and Shanghai
The best day to arrive at Seoul is Sunday and it would be best to avoid Saturday, as prices are on average 139.7% higher than on Sunday. (Average prices, based on 4486036 datapoints.)
We have a lot more statistics for flights 9C 8560 and between Seoul and Shanghai.