Flight Sydney Airport departs from Sydney Sydney Airport at 07:55 and arrives at Singapore Changi Airport at 14:15.
The flighttime is about 8h 20m. The distance travelled ("as the bird flies"): 5577 Km. So the average speed is roughly 669 Km.
There is an 2 hour time difference between Sydney and Singapore
The best day to arrive at Sydney is Tuesday and it would be best to avoid Thursday, as prices are on average 147.3% higher than on Tuesday. (Average prices, based on 355337 datapoints.)
We have a lot more statistics for flights VA 5512 and between Sydney and Singapore.