Flight Haneda Airport departs from Tokyo Haneda Airport at 08:55 and arrives at Hong Kong Hong Kong International Airport at 12:30.
The flighttime is about 4h 35m. The distance travelled ("as the bird flies"): 2992 Km. So the average speed is roughly 653 Km.
There is an 1 hour time difference between Tokyo and Hong Kong
The best day to arrive at Tokyo is Monday and it would be best to avoid Friday, as prices are on average 333.49% higher than on Monday. (Average prices, based on 1104124 datapoints.)
We have a lot more statistics for flights GA 859 and between Tokyo and Hong Kong.