Flight Changi Airport departs from Singapore Changi Airport at 11:10 and arrives at Perth Perth Airport at 16:35.
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 Singapore is Friday and it would be best to avoid Saturday, as prices are on average 517.45% higher than on Friday. (Average prices, based on 275191 datapoints.)
We have a lot more statistics for flights TR8 and between Singapore and Perth.
