Flight Hong Kong International Airport departs from Hong Kong Hong Kong International Airport at 00:45 and arrives at Seoul Incheon International Airport at 05:25.
The flighttime is about 3h 40m. The distance travelled ("as the bird flies"): 1621 Km. So the average speed is roughly 442 Km.
There is an 1 hour time difference between Hong Kong and Seoul
The best day to arrive at Hong Kong is Wednesday and it would be best to avoid Thursday, as prices are on average 69.3% higher than on Wednesday. (Average prices, based on 30524899 datapoints.)
We have a lot more statistics for flights KE 178 and between Hong Kong and Seoul.