Flight Haneda Airport departs from Tokyo Haneda Airport at 11:30 and arrives at Fukuoka Fukuoka Airport at 13:25.
The flighttime is about 1h 55m. The distance travelled ("as the bird flies"): 1048 Km. So the average speed is roughly 547 Km.
The best month to arrive at Tokyo is February and the most expensive month to fly is December. (Average prices, based on 3547 datapoints.)
The best day to arrive at Tokyo is Monday and it would be best to avoid Saturday, as prices are on average 14.8% higher than on Monday. (Average prices, based on 3097214 datapoints.)
We have a lot more statistics for flights GA 251 and between Tokyo and Fukuoka.