Flight International Airport departs from Osaka International Airport at 15:40 and arrives at Tokyo Haneda Airport at 17:00.
The flighttime is about 1h 20m. The distance travelled ("as the bird flies"): 485 Km. So the average speed is roughly 364 Km.
The best day to arrive at Osaka is Friday and it would be best to avoid Monday, as prices are on average 49.94% higher than on Friday. (Average prices, based on 2620281 datapoints.)
We have a lot more statistics for flights JL 124 and between Osaka and Tokyo.
