The best month to fly between Perth and Sydney is February and the most expensive month to fly is May. (Average prices, based on 1249 datapoints.)
The best day to arrive at Perth is Sunday and it would be best to avoid Saturday, as prices are on average 156.65% higher than on Sunday. (Average prices, based on 12799529 datapoints.)
The best time to fly is at around 5. (Average prices, based on 1408 datapoints.)