Flight Hong Kong International Airport departs from Hong Kong Hong Kong International Airport at 16:15 and arrives at Nagoya Chubu Centrair International Airport at 21:15.
The flighttime is about 4h 00m. The distance travelled ("as the bird flies"): 2658 Km. So the average speed is roughly 664 Km.
There is an 1 hour time difference between Hong Kong and Nagoya