Flight Perth Airport departs from Perth Perth Airport at 01:10 and arrives at Singapore Changi Airport at 06:35.
The flighttime is about 5h 25m. The distance travelled ("as the bird flies"): 1789 Km. So the average speed is roughly 330 Km.
The best day to arrive at Perth is Friday and it would be best to avoid Saturday, as prices are on average 73.25% higher than on Friday. (Average prices, based on 267371 datapoints.)
We have a lot more statistics for flights SQ 216 and between Perth and Singapore.