Flight Haneda Airport departs from Tokyo Haneda Airport at 11:30 and arrives at Osaka Kansai International Airport at 12:35.
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 Tokyo is Monday and it would be best to avoid Friday, as prices are on average 83.51% higher than on Monday. (Average prices, based on 5438035 datapoints.)
We have a lot more statistics for flights JL 115 and between Tokyo and Osaka.