Flight Brisbane Airport departs from Brisbane Brisbane Airport at 12:00 and arrives at Melbourne Melbourne Airport at 15:25.
The flighttime is about 3h 25m. The distance travelled ("as the bird flies"): 1343 Km. So the average speed is roughly 393 Km.
The best day to arrive at Brisbane is Monday and it would be best to avoid Wednesday, as prices are on average 44.75% higher than on Monday. (Average prices, based on 1154489 datapoints.)
We have a lot more statistics for flights JQ 569 and between Brisbane and Melbourne.