Flight International Airport departs from Osaka International Airport at 10:30 and arrives at Tokyo Narita International Airport at 11:40.
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 Tuesday and it would be best to avoid Friday, as prices are on average 29.7% higher than on Tuesday. (Average prices, based on 409160 datapoints.)
We have a lot more statistics for flights JL 112 and between Osaka and Tokyo.