Flight Sydney Airport departs from Sydney Sydney Airport at 08:25 and arrives at Perth Perth Airport at 10:20.
The flighttime is about 3h 55m. The distance travelled ("as the bird flies"): 3917 Km. So the average speed is roughly 1000 Km.
There is an 2 hour time difference between Sydney and Perth
The best day to arrive at Sydney is Friday and it would be best to avoid Monday, as prices are on average 52.38% higher than on Friday. (Average prices, based on 7178146 datapoints.)
We have a lot more statistics for flights QF 575 and between Sydney and Perth.