Flight Kansai International Airport departs from Osaka Kansai International Airport at 18:55 and arrives at Xiamen Gaoqi International Airport at 21:50.
The flighttime is about 3h 55m. The distance travelled ("as the bird flies"): 2008 Km. So the average speed is roughly 513 Km.
There is an 1 hour time difference between Osaka and Xiamen