Flight Sydney Airport departs from Sydney Sydney Airport at 15:35 and arrives at Brisbane Brisbane Airport at 16:05.
The flighttime is about 0h 30m. The distance travelled ("as the bird flies"): 680 Km. So the average speed is roughly 1360 Km.
The best day to arrive at Sydney is Tuesday and it would be best to avoid Thursday, as prices are on average 154.13% higher than on Tuesday. (Average prices, based on 3839939 datapoints.)
We have a lot more statistics for flights QF 530 and between Sydney and Brisbane.