Flight Hong Kong International Airport departs from Hong Kong Hong Kong International Airport at 13:55 and arrives at Beijing Beijing Capital International Airport at 17:25.
The flighttime is about 3h 30m. The distance travelled ("as the bird flies"): 890 Km. So the average speed is roughly 254 Km.
The best day to arrive at Hong Kong is Monday and it would be best to avoid Sunday, as prices are on average 151.57% higher than on Monday. (Average prices, based on 164191 datapoints.)
We have a lot more statistics for flights SQ 392 and between Hong Kong and Beijing.