Flight Narita International Airport departs from Tokyo Narita International Airport at 14:00 and arrives at Hong Kong Hong Kong International Airport at 18:20.
The flighttime is about 5h 20m. The distance travelled ("as the bird flies"): 3064 Km. So the average speed is roughly 574 Km.
There is an 1 hour time difference between Tokyo and Hong Kong
The best day to arrive at Tokyo is Wednesday and it would be best to avoid Saturday, as prices are on average 167.67% higher than on Wednesday. (Average prices, based on 15873250 datapoints.)
We have a lot more statistics for flights HX 605 and between Tokyo and Hong Kong.