Flight Sydney Airport departs from Sydney Sydney Airport at 11:50 and arrives at Canberra International Airport at 12:45.
The flighttime is about 0h 55m. The distance travelled ("as the bird flies"): 256 Km. So the average speed is roughly 279 Km.
The best day to arrive at Sydney is Saturday and it would be best to avoid Thursday, as prices are on average 48.64% higher than on Saturday. (Average prices, based on 201032 datapoints.)
We have a lot more statistics for flights QF 803 and between Sydney and Canberra.