Flight International Airport departs from Osaka International Airport at 11:15 and arrives at Miyazaki Miyazaki Bougainvillea Airport at 12:30.
The flighttime is about 10h 15m. The distance travelled ("as the bird flies"): 496 Km. So the average speed is roughly 48 Km.
There is an 9 hour time difference between Osaka and Miyazaki