Flight Changi Airport departs from Singapore Changi Airport at 09:55 and arrives at Hong Kong Hong Kong International Airport at 13:55.
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 day to arrive at Singapore is Sunday and it would be best to avoid Saturday, as prices are on average 143.62% higher than on Sunday. (Average prices, based on 3150321 datapoints.)
We have a lot more statistics for flights SQ 892 and between Singapore and Hong Kong.
