Please be aware that Osaka has multiple airports and that these results are only for International airport.
The best month to arrive at Osaka is June and the most expensive month to fly is January. (Average prices, based on 333 datapoints.)
The best day to arrive at Osaka is Wednesday and it would be best to avoid Tuesday, as prices are on average 35.06% higher than on Wednesday. (Average prices, based on 1186 datapoints.)
The cheapest airline flying to Osaka is Iberia Airlines. They are 27% cheaper than ANA Wings. (Average prices, based on 399 datapoints.)
At Osaka the most flights depart around 11:00. (Hourly flights, based on 434 datapoints.)
From Osaka it is on average the cheapest to fly to Tokyo and to Tokyo. (Average prices, based on 646 datapoints.)