Flight Brisbane Airport departs from Brisbane Brisbane Airport at 07:15 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.
There is an 1 hour time difference between Brisbane and Sydney
The best day to arrive at Brisbane is Sunday and it would be best to avoid Wednesday, as prices are on average 200.75% higher than on Sunday. (Average prices, based on 5999438 datapoints.)
We have a lot more statistics for flights QF 509 and between Brisbane and Sydney.