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 October and the most expensive month to fly is February. (Average prices, based on 674 datapoints.)
The best day to arrive at Osaka is Thursday and it would be best to avoid Tuesday, as prices are on average 38.05% higher than on Thursday. (Average prices, based on 1114 datapoints.)
At Osaka the most flights depart around 11:00. (Hourly flights, based on 735 datapoints.)