Flight Incheon International Airport departs from Seoul Incheon International Airport at 07:45 and arrives at Hong Kong Hong Kong International Airport at 10:40.
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 Monday, as prices are on average 124.79% higher than on Thursday. (Average prices, based on 21364345 datapoints.)
We have a lot more statistics for flights KE 173 and between Seoul and Hong Kong.