The best month to fly between Singapore and Hong Kong is May and the most expensive month to fly is August. (Average prices, based on 668 datapoints.)
The best day to arrive at Singapore is Tuesday and it would be best to avoid Saturday, as prices are on average 53.15% higher than on Tuesday. (Average prices, based on 4189810 datapoints.)
The best time to fly is at around 8. (Average prices, based on 1472 datapoints.)