Flight Hong Kong International Airport departs from Hong Kong Hong Kong International Airport at 09:00 and arrives at Beijing Beijing Capital International Airport at 12:25.
The flighttime is about 3h 25m. The distance travelled ("as the bird flies"): 890 Km. So the average speed is roughly 260 Km.
The best day to arrive at Hong Kong is Saturday and it would be best to avoid Friday, as prices are on average 454.69% higher than on Saturday. (Average prices, based on 256574 datapoints.)
We have a lot more statistics for flights CX 390 and between Hong Kong and Beijing.
