Flight Brisbane Airport departs from Brisbane Brisbane Airport at 08:15 and arrives at Sydney Sydney Airport at 09:50.
The flighttime is about 1h 35m. The distance travelled ("as the bird flies"): 680 Km. So the average speed is roughly 429 Km.
The best day to arrive at Brisbane is Monday and it would be best to avoid Wednesday, as prices are on average 140.16% higher than on Monday. (Average prices, based on 5441895 datapoints.)
We have a lot more statistics for flights QF 509 and between Brisbane and Sydney.
THB
