Flight Changi Airport departs from Singapore Changi Airport at 19:00 and arrives at Hong Kong Hong Kong International Airport at 23:00.
The flighttime is about 4h 00m. The distance travelled ("as the bird flies"): 1322 Km. So the average speed is roughly 330 Km.
The best month to arrive at Singapore is June and the most expensive month to fly is August. (Average prices, based on 1193 datapoints.)
The best day to arrive at Singapore is Wednesday and it would be best to avoid Tuesday, as prices are on average 253.17% higher than on Wednesday. (Average prices, based on 3509172 datapoints.)
We have a lot more statistics for flights ET 1323 and between Singapore and Hong Kong.