Flight Incheon International Airport departs from Seoul Incheon International Airport at 14:10 and arrives at Shanghai Pudong International Airport at 15:10.
The flighttime is about 2h 00m. The distance travelled ("as the bird flies"): 649 Km. So the average speed is roughly 324 Km.
There is an 1 hour time difference between Seoul and Shanghai
The best day to arrive at Seoul is Wednesday and it would be best to avoid Monday, as prices are on average 1016.31% higher than on Wednesday. (Average prices, based on 2929538 datapoints.)
We have a lot more statistics for flights SQ 365 and between Seoul and Shanghai.