The best month to fly between Singapore and Sydney is June and the most expensive month to fly is February. (Average prices, based on 266 datapoints.)
The best day to arrive at Singapore is Sunday and it would be best to avoid Saturday, as prices are on average 85.32% higher than on Sunday. (Average prices, based on 790106 datapoints.)
The best time to fly is at around 10. (Average prices, based on 520 datapoints.)