Flight Sydney Airport departs from Sydney Sydney Airport at 17:00 and arrives at Melbourne Melbourne Airport at 12:55.The flight has a short stop at Canberra.
The flighttime is about 19h 55m. The distance travelled ("as the bird flies"): 787 Km. So the average speed is roughly 40 Km.
The best day to arrive at Sydney is Saturday and it would be best to avoid Tuesday, as prices are on average 261.17% higher than on Saturday. (Average prices, based on 37821387 datapoints.)
We have a lot more statistics for flights QF 1517 and between Sydney and Melbourne.