Flight Changi Airport departs from Singapore Changi Airport at 07:15 and arrives at Perth Perth Airport at 12:30.
The flighttime is about 5h 15m. The distance travelled ("as the bird flies"): 1789 Km. So the average speed is roughly 341 Km.
The best day to arrive at Singapore is Thursday and it would be best to avoid Sunday, as prices are on average 1130.56% higher than on Thursday. (Average prices, based on 227605 datapoints.)
We have a lot more statistics for flights SQ 213 and between Singapore and Perth.