Flight Incheon International Airport departs from Seoul Incheon International Airport at 22:30 and arrives at Hong Kong Hong Kong International Airport at 01:20.
The flighttime is about 3h 50m. The distance travelled ("as the bird flies"): 1621 Km. So the average speed is roughly 423 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 Sunday, as prices are on average 79.04% higher than on Thursday. (Average prices, based on 21521149 datapoints.)
We have a lot more statistics for flights UO 627 and between Seoul and Hong Kong.
