Flight Kansai International Airport departs from Osaka Kansai International Airport at 07:10 and arrives at Tokyo Narita International Airport at 08:15.
The flighttime is about 1h 05m. The distance travelled ("as the bird flies"): 582 Km. So the average speed is roughly 537 Km.
The best day to arrive at Osaka is Tuesday and it would be best to avoid Sunday, as prices are on average 42.29% higher than on Tuesday. (Average prices, based on 8619153 datapoints.)
We have a lot more statistics for flights NH 94 and between Osaka and Tokyo.