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 Sunday and it would be best to avoid Tuesday, as prices are on average 211.96% higher than on Sunday. (Average prices, based on 4187317 datapoints.)
The best time to fly is at around 8. (Average prices, based on 1472 datapoints.)