Flight Haneda Airport departs from Tokyo Haneda Airport at 20:30 and arrives at Osaka Kansai International Airport at 21:45.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 511 Km. So the average speed is roughly 409 Km.
The best day to arrive at Tokyo is Sunday and it would be best to avoid Friday, as prices are on average 65.14% higher than on Sunday. (Average prices, based on 6942063 datapoints.)
We have a lot more statistics for flights NH 415 and between Tokyo and Osaka.
