Flight Sydney Airport departs from Sydney Sydney Airport at 08:30 and arrives at Brisbane Brisbane Airport at 09:00.
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 Saturday and it would be best to avoid Tuesday, as prices are on average 77.58% higher than on Saturday. (Average prices, based on 3862286 datapoints.)
We have a lot more statistics for flights VA 921 and between Sydney and Brisbane.