Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 18:55 and arrives at Perth Perth Airport at 00:20.
The flighttime is about 4h 25m. The distance travelled ("as the bird flies"): 1448 Km. So the average speed is roughly 328 Km.
There is an 1 hour time difference between Jakarta and Perth
The best day to arrive at Jakarta is Thursday and it would be best to avoid Saturday, as prices are on average 45.34% higher than on Thursday. (Average prices, based on 227387 datapoints.)
We have a lot more statistics for flights OD 9120 and between Jakarta and Perth.