Flight Melbourne Airport departs from Melbourne Melbourne Airport at 11:30 and arrives at Sydney Sydney Airport at 12:55.
The flighttime is about 1h 25m. The distance travelled ("as the bird flies"): 787 Km. So the average speed is roughly 556 Km.
The best day to arrive at Melbourne is Wednesday and it would be best to avoid Sunday, as prices are on average 64.76% higher than on Wednesday. (Average prices, based on 29551139 datapoints.)
We have a lot more statistics for flights JQ 512 and between Melbourne and Sydney.