Flight Sydney Airport departs from Sydney Sydney Airport at 09:15 and arrives at Melbourne Melbourne Airport at 10:50.
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 Saturday and it would be best to avoid Monday, as prices are on average 71.24% higher than on Saturday. (Average prices, based on 36831384 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 129 datapoints.)
We have a lot more statistics for flights QF 429 and between Sydney and Melbourne.