Flight Melbourne Airport departs from Melbourne Melbourne Airport at 21:30 and arrives at Brisbane Brisbane Airport at 23:40.
The flighttime is about 2h 10m. The distance travelled ("as the bird flies"): 1343 Km. So the average speed is roughly 620 Km.
The best day to arrive at Melbourne is Tuesday and it would be best to avoid Saturday, as prices are on average 234.92% higher than on Tuesday. (Average prices, based on 4302205 datapoints.)
We have a lot more statistics for flights QF 638 and between Melbourne and Brisbane.