Flight Kansai International Airport departs from Osaka Kansai International Airport at 06:45 and arrives at Tokyo Haneda Airport at 07:50.
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 Tuesday and it would be best to avoid Saturday, as prices are on average 111.64% higher than on Tuesday. (Average prices, based on 6467924 datapoints.)
We have a lot more statistics for flights JL 220 and between Osaka and Tokyo.