Flight Changi Airport departs from Singapore Changi Airport at 10:30 and arrives at Sydney Sydney Airport at 21:15.
The flighttime is about 8h 45m. The distance travelled ("as the bird flies"): 5577 Km. So the average speed is roughly 637 Km.
There is an 2 hour time difference between Singapore and Sydney
The best day to arrive at Singapore is Saturday and it would be best to avoid Friday, as prices are on average 150.14% higher than on Saturday. (Average prices, based on 770075 datapoints.)
We have a lot more statistics for flights SQ 211 and between Singapore and Sydney.
