Flight Incheon International Airport departs from Seoul Incheon International Airport at 16:20 and arrives at Shanghai Pudong International Airport at 17:30.
The flighttime is about 2h 10m. The distance travelled ("as the bird flies"): 649 Km. So the average speed is roughly 300 Km.
There is an 1 hour time difference between Seoul and Shanghai
The best day to arrive at Seoul is Friday and it would be best to avoid Monday, as prices are on average 62.35% higher than on Friday. (Average prices, based on 3022334 datapoints.)
We have a lot more statistics for flights FM 3072 and between Seoul and Shanghai.