Flight Incheon International Airport departs from Seoul Incheon International Airport at 20:00 and arrives at Shanghai Pudong International Airport at 21:05.
The flighttime is about 2h 05m. The distance travelled ("as the bird flies"): 649 Km. So the average speed is roughly 312 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 Sunday, as prices are on average 12.14% higher than on Friday. (Average prices, based on 2992909 datapoints.)
We have a lot more statistics for flights GA 367 and between Seoul and Shanghai.