Flight Kansai International Airport departs from Osaka Kansai International Airport at 06:50 and arrives at Tokyo Haneda Airport at 07:55.
The flighttime is about 1h 05m. The distance travelled ("as the bird flies"): 511 Km. So the average speed is roughly 472 Km.
The best day to arrive at Osaka is Friday and it would be best to avoid Monday, as prices are on average 52.52% higher than on Friday. (Average prices, based on 6467700 datapoints.)
We have a lot more statistics for flights NH 990 and between Osaka and Tokyo.