The best month to fly between Fukuoka and Osaka is January and the most expensive month to fly is July. (Average prices, based on 233 datapoints.)
The best day to arrive at Fukuoka is Monday and it would be best to avoid Friday, as prices are on average 17.42% higher than on Monday. (Average prices, based on 224 datapoints.)
The best time to fly is at around 21. (Average prices, based on 433 datapoints.)