Flight Sydney Airport departs from Sydney Sydney Airport at 07:15 and arrives at Perth Perth Airport at 10:30.
The flighttime is about 5h 15m. The distance travelled ("as the bird flies"): 3917 Km. So the average speed is roughly 746 Km.
There is an 2 hour time difference between Sydney and Perth
The best day to arrive at Sydney is Tuesday and it would be best to avoid Saturday, as prices are on average 142.56% higher than on Tuesday. (Average prices, based on 7180734 datapoints.)
We have a lot more statistics for flights VA 551 and between Sydney and Perth.