Flight Incheon International Airport departs from Seoul Incheon International Airport at 12:55 and arrives at Shanghai Pudong International Airport at 13:45.
The flighttime is about 1h 50m. The distance travelled ("as the bird flies"): 649 Km. So the average speed is roughly 354 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 231.21% higher than on Sunday. (Average prices, based on 2950403 datapoints.)
We have a lot more statistics for flights MU 5042 and between Seoul and Shanghai.