Flight Brisbane Airport departs from Brisbane Brisbane Airport at 18:05 and arrives at Sydney Sydney Airport at 20:40.
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 Tuesday and it would be best to avoid Wednesday, as prices are on average 68.28% higher than on Tuesday. (Average prices, based on 5426548 datapoints.)
We have a lot more statistics for flights VA 978 and between Brisbane and Sydney.