Flight Incheon International Airport departs from Seoul Incheon International Airport at 14:30 and arrives at Shanghai Pudong International Airport at 15:45.
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 Saturday and it would be best to avoid Tuesday, as prices are on average 360% higher than on Saturday. (Average prices, based on 2955799 datapoints.)
We have a lot more statistics for flights MU 5062 and between Seoul and Shanghai.