Flight Narita International Airport departs from Tokyo Narita International Airport at 20:05 and arrives at Hong Kong Hong Kong International Airport at 00:35.
The flighttime is about 5h 30m. The distance travelled ("as the bird flies"): 3064 Km. So the average speed is roughly 557 Km.
There is an 1 hour time difference between Tokyo and Hong Kong
The best day to arrive at Tokyo is Thursday and it would be best to avoid Saturday, as prices are on average 158.13% higher than on Thursday. (Average prices, based on 15810485 datapoints.)
We have a lot more statistics for flights UO 651 and between Tokyo and Hong Kong.