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 Monday and it would be best to avoid Sunday, as prices are on average 16.46% higher than on Monday. (Average prices, based on 13079047 datapoints.)
The best time to fly is at around 6. (Average prices, based on 1381 datapoints.)