The best month to fly between Fukuoka and Tokyo is January and the most expensive month to fly is September. (Average prices, based on 1411 datapoints.)
The best day to arrive at Fukuoka is Wednesday and it would be best to avoid Sunday, as prices are on average 126.34% higher than on Wednesday. (Average prices, based on 511 datapoints.)
The best time to fly is at around 13. (Average prices, based on 2462 datapoints.)