The best month to fly between Hong Kong and Singapore is November and the most expensive month to fly is December. (Average prices, based on 869 datapoints.)
The best day to arrive at Hong Kong is Thursday and it would be best to avoid Saturday, as prices are on average 77.47% higher than on Thursday. (Average prices, based on 3590340 datapoints.)
The best time to fly is at around 8. (Average prices, based on 1517 datapoints.)