Flight Kansai International Airport departs from Osaka Kansai International Airport at 08:25 and arrives at Tokyo Narita International Airport at 09:40.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 582 Km. So the average speed is roughly 466 Km.
The best day to arrive at Osaka is Friday and it would be best to avoid Saturday, as prices are on average 19.99% higher than on Friday. (Average prices, based on 8609039 datapoints.)
We have a lot more statistics for flights NH 96 and between Osaka and Tokyo.