Flight Changi Airport departs from Singapore Changi Airport at 13:10 and arrives at Hong Kong Hong Kong International Airport at 17:10.
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 Thursday and it would be best to avoid Saturday, as prices are on average 147.9% higher than on Thursday. (Average prices, based on 3926298 datapoints.)
We have a lot more statistics for flights SQ 894 and between Singapore and Hong Kong.
