Flight Hong Kong International Airport departs from Hong Kong Hong Kong International Airport at 21:05 and arrives at Chongqing Chongqing Jiangbei International Airport at 23:45.
The flighttime is about 3h 40m. The distance travelled ("as the bird flies"): 856 Km. So the average speed is roughly 233 Km.
There is an 1 hour time difference between Hong Kong and Chongqing