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 April. (Average prices, based on 1078 datapoints.)
The best day to arrive at Osaka is Thursday and it would be best to avoid Tuesday, as prices are on average 43.2% higher than on Thursday. (Average prices, based on 1097 datapoints.)
At Osaka the most flights depart around 08:00. (Hourly flights, based on 1105 datapoints.)