Flight Kansai International Airport departs from Osaka Kansai International Airport at 15:45 and arrives at Tokyo Haneda Airport at 17:05.
The flighttime is about 1h 20m. The distance travelled ("as the bird flies"): 511 Km. So the average speed is roughly 383 Km.
The best day to arrive at Osaka is Tuesday and it would be best to avoid Saturday, as prices are on average 73.31% higher than on Tuesday. (Average prices, based on 6544154 datapoints.)
We have a lot more statistics for flights EH 992 and between Osaka and Tokyo.