Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 23:55 and arrives at Sydney Sydney Airport at 10:45.
The flighttime is about 7h 50m. The distance travelled ("as the bird flies"): 5208 Km. So the average speed is roughly 665 Km.
There is an 3 hour time difference between Jakarta and Sydney
The best month to arrive at Jakarta is March and the most expensive month to fly is January. (Average prices, based on 1683 datapoints.)
We have a lot more statistics for flights EY 8139 and between Jakarta and Sydney.