Flight Changi Airport departs from Singapore Changi Airport at 19:35 and arrives at Perth Perth Airport at 00:40.
The flighttime is about 5h 05m. The distance travelled ("as the bird flies"): 1789 Km. So the average speed is roughly 352 Km.
The best day to arrive at Singapore is Friday and it would be best to avoid Wednesday, as prices are on average 549.14% higher than on Friday. (Average prices, based on 354701 datapoints.)
We have a lot more statistics for flights QF 72 and between Singapore and Perth.
