Flight International Airport departs from Osaka International Airport at 08:00 and arrives at Tokyo Narita International Airport at 09:20.
The flighttime is about 1h 20m. The distance travelled ("as the bird flies"): 556 Km. So the average speed is roughly 417 Km.
The best day to arrive at Osaka is Sunday and it would be best to avoid Wednesday, as prices are on average 128.6% higher than on Sunday. (Average prices, based on 423888 datapoints.)
We have a lot more statistics for flights JL 3004 and between Osaka and Tokyo.
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