Flight International Airport departs from Osaka International Airport at 10:00 and arrives at Tokyo Haneda Airport at 11:15.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 485 Km. So the average speed is roughly 388 Km.
The best day to arrive at Osaka is Sunday and it would be best to avoid Tuesday, as prices are on average 18.71% higher than on Sunday. (Average prices, based on 1610723 datapoints.)
We have a lot more statistics for flights NH 20 and between Osaka and Tokyo.