Flight Changi Airport departs from Singapore Changi Airport at 14:05 and arrives at Hong Kong Hong Kong International Airport at 20:40.The flight has a short stop at Bangkok.
The flighttime is about 6h 35m. The distance travelled ("as the bird flies"): 1322 Km. So the average speed is roughly 201 Km.
The best day to arrive at Singapore is Monday and it would be best to avoid Saturday, as prices are on average 266.17% higher than on Monday. (Average prices, based on 3135681 datapoints.)
We have a lot more statistics for flights CX 630 and between Singapore and Hong Kong.