Flight Sydney Airport departs from Sydney Sydney Airport at 12:10 and arrives at Kuala Lumpur Kuala Lumpur International Airport at 17:45.
The flighttime is about 7h 35m. The distance travelled ("as the bird flies"): 5790 Km. So the average speed is roughly 764 Km.
There is an 2 hour time difference between Sydney and Kuala Lumpur