Flight Incheon International Airport departs from Seoul Incheon International Airport at 13:25 and arrives at Hong Kong Hong Kong International Airport at 16:20.
The flighttime is about 3h 55m. The distance travelled ("as the bird flies"): 1621 Km. So the average speed is roughly 414 Km.
There is an 1 hour time difference between Seoul and Hong Kong
The best day to arrive at Seoul is Thursday and it would be best to avoid Saturday, as prices are on average 66.92% higher than on Thursday. (Average prices, based on 21364310 datapoints.)
We have a lot more statistics for flights KE 175 and between Seoul and Hong Kong.