Flight Sydney Airport departs from Sydney Sydney Airport at 21:45 and arrives at Melbourne Melbourne Airport at 23:20.
The flighttime is about 1h 35m. The distance travelled ("as the bird flies"): 787 Km. So the average speed is roughly 497 Km.
The best day to arrive at Sydney is Sunday and it would be best to avoid Thursday, as prices are on average 99.49% higher than on Sunday. (Average prices, based on 37214071 datapoints.)
We have a lot more statistics for flights VA 898 and between Sydney and Melbourne.