Flight Sydney Airport departs from Sydney Sydney Airport at 13:55 and arrives at Jakarta Soekarno–Hatta International Airport at 19:00.
The flighttime is about 8h 05m. The distance travelled ("as the bird flies"): 5208 Km. So the average speed is roughly 644 Km.
There is an 3 hour time difference between Sydney and Jakarta
The best day to arrive at Sydney is Wednesday and it would be best to avoid Friday, as prices are on average 34.2% higher than on Wednesday. (Average prices, based on 1851326 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 126 datapoints.)
We have a lot more statistics for flights QF 41 and between Sydney and Jakarta.