Flight Haneda Airport departs from Tokyo Haneda Airport at 19:15 and arrives at Osaka Kansai International Airport at 20:35.
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 Tokyo is Thursday and it would be best to avoid Tuesday, as prices are on average 77.49% higher than on Thursday. (Average prices, based on 6944257 datapoints.)
We have a lot more statistics for flights NH 41 and between Tokyo and Osaka.