Flight Narita International Airport departs from Tokyo Narita International Airport at 09:00 and arrives at Hong Kong Hong Kong International Airport at 13:25.
The flighttime is about 5h 25m. The distance travelled ("as the bird flies"): 3064 Km. So the average speed is roughly 566 Km.
There is an 1 hour time difference between Tokyo and Hong Kong
The best day to arrive at Tokyo is Sunday and it would be best to avoid Saturday, as prices are on average 41.21% higher than on Sunday. (Average prices, based on 15891930 datapoints.)
We have a lot more statistics for flights CX 509 and between Tokyo and Hong Kong.