Flight Changi Airport departs from Singapore Changi Airport at 21:50 and arrives at Melbourne Melbourne Airport at 08:15.
The flighttime is about 7h 25m. The distance travelled ("as the bird flies"): 4956 Km. So the average speed is roughly 668 Km.
There is an 3 hour time difference between Singapore and Melbourne
The best day to arrive at Singapore is Sunday and it would be best to avoid Thursday, as prices are on average 258.64% higher than on Sunday. (Average prices, based on 480726 datapoints.)
We have a lot more statistics for flights SQ 227 and between Singapore and Melbourne.