Flight Kansai International Airport departs from Osaka Kansai International Airport at 15:05 and arrives at Tokyo Haneda Airport at 16:15.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 511 Km. So the average speed is roughly 438 Km.
The best day to arrive at Osaka is Monday and it would be best to avoid Saturday, as prices are on average 103.32% higher than on Monday. (Average prices, based on 6468256 datapoints.)
We have a lot more statistics for flights JL 224 and between Osaka and Tokyo.