Flight Narita International Airport departs from Tokyo Narita International Airport at 18:00 and arrives at Chitose New Chitose Airport at 19:50.
The flighttime is about 1h 50m. The distance travelled ("as the bird flies"): 623 Km. So the average speed is roughly 340 Km.
The best day to arrive at Tokyo is Tuesday and it would be best to avoid Saturday, as prices are on average 432.27% higher than on Tuesday. (Average prices, based on 1194625 datapoints.)
We have a lot more statistics for flights MM 585 and between Tokyo and Chitose.