The best month to fly between Sydney and Singapore is October and the most expensive month to fly is November. (Average prices, based on 345 datapoints.)
The best day to arrive at Sydney is Tuesday and it would be best to avoid Saturday, as prices are on average 331.43% higher than on Tuesday. (Average prices, based on 793894 datapoints.)
The best time to fly is at around 20. (Average prices, based on 502 datapoints.)