Flight International Airport departs from Osaka International Airport at 14:35 and arrives at Tokyo Narita International Airport at 16:00.
The flighttime is about 1h 25m. The distance travelled ("as the bird flies"): 556 Km. So the average speed is roughly 392 Km.
The best day to arrive at Osaka is Monday and it would be best to avoid Friday, as prices are on average 73.65% higher than on Monday. (Average prices, based on 408649 datapoints.)
We have a lot more statistics for flights JL 3006 and between Osaka and Tokyo.