Flight Sydney Airport departs from Sydney Sydney Airport at 18:45 and arrives at Melbourne Melbourne Airport at 20:20.
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 Wednesday and it would be best to avoid Saturday, as prices are on average 46.69% higher than on Wednesday. (Average prices, based on 37240052 datapoints.)
We have a lot more statistics for flights NZ 1861 and between Sydney and Melbourne.