Flight International Airport departs from Osaka International Airport at 11:30 and arrives at Tokyo Narita International Airport at 12:40.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 556 Km. So the average speed is roughly 477 Km.
The best day to arrive at Osaka is Sunday and it would be best to avoid Saturday, as prices are on average 81.46% higher than on Sunday. (Average prices, based on 409775 datapoints.)
We have a lot more statistics for flights JL 114 and between Osaka and Tokyo.