Flight International Airport departs from Osaka International Airport at 09:30 and arrives at Miyazaki Miyazaki Bougainvillea Airport at 10:40.
The flighttime is about 10h 10m. The distance travelled ("as the bird flies"): 496 Km. So the average speed is roughly 49 Km.
There is an 9 hour time difference between Osaka and Miyazaki
