Flight Narita International Airport departs from Tokyo Narita International Airport at 17:30 and arrives at Hong Kong Hong Kong International Airport at 22:05.
The flighttime is about 5h 35m. The distance travelled ("as the bird flies"): 3064 Km. So the average speed is roughly 549 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 Friday, as prices are on average 513.14% higher than on Wednesday. (Average prices, based on 15893562 datapoints.)
We have a lot more statistics for flights HX 635 and between Tokyo and Hong Kong.