Flight International Airport departs from Osaka International Airport at 14:00 and arrives at Tokyo Narita International Airport at 15:20.
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 Friday, as prices are on average 204.94% higher than on Sunday. (Average prices, based on 433931 datapoints.)
We have a lot more statistics for flights EH 2178 and between Osaka and Tokyo.