Flight Kansai International Airport departs from Osaka Kansai International Airport at 10:15 and arrives at Jakarta Soekarno–Hatta International Airport at 12:45.The flight has a short stop at Hong Kong.
The flighttime is about 4h 30m. The distance travelled ("as the bird flies"): 3779 Km. So the average speed is roughly 840 Km.
There is an 2 hour time difference between Osaka and Jakarta