Flight Brisbane Airport departs from Brisbane Brisbane Airport at 06:00 and arrives at Melbourne Melbourne Airport at 08:30.
The flighttime is about 2h 30m. The distance travelled ("as the bird flies"): 1343 Km. So the average speed is roughly 537 Km.
The best day to arrive at Brisbane is Monday and it would be best to avoid Sunday, as prices are on average 123.63% higher than on Monday. (Average prices, based on 1649945 datapoints.)
We have a lot more statistics for flights QF 605 and between Brisbane and Melbourne.
