Please be aware that Tokyo and Osaka has multiple airports and that these results are for all airports serving the city.
The best month to fly between Tokyo and Osaka is September and the most expensive month to fly is April. (Average prices, based on 483 datapoints.)
The best day to arrive at Tokyo is Sunday and it would be best to avoid Tuesday, as prices are on average 54.69% higher than on Sunday. (Average prices, based on 504 datapoints.)
The cheapest airline flying from Tokyo to Osaka is Peach Aviation. They are 70% cheaper than Japan Airlines. (Average prices, based on 514 datapoints.)
The best time to fly is at around 19. (Average prices, based on 1435 datapoints.)