Flight Hong Kong International Airport departs from Hong Kong Hong Kong International Airport at 13:00 and arrives at Tokyo Narita International Airport at 18:25.
The flighttime is about 4h 25m. The distance travelled ("as the bird flies"): 3064 Km. So the average speed is roughly 694 Km.
There is an 1 hour time difference between Hong Kong and Tokyo
The best day to arrive at Hong Kong is Saturday and it would be best to avoid Sunday, as prices are on average 337.31% higher than on Saturday. (Average prices, based on 8607060 datapoints.)
We have a lot more statistics for flights UO 646 and between Hong Kong and Tokyo.
