Flight Brisbane Airport departs from Brisbane Brisbane Airport at 05:15 and arrives at Sydney Sydney Airport at 07:50.
The flighttime is about 2h 35m. The distance travelled ("as the bird flies"): 680 Km. So the average speed is roughly 263 Km.
The best day to arrive at Brisbane is Saturday and it would be best to avoid Wednesday, as prices are on average 168.84% higher than on Saturday. (Average prices, based on 5423452 datapoints.)
We have a lot more statistics for flights VA 904 and between Brisbane and Sydney.