Flight Hong Kong International Airport departs from Hong Kong Hong Kong International Airport at 07:50 and arrives at Singapore Changi Airport at 11:55.
The flighttime is about 4h 05m. The distance travelled ("as the bird flies"): 1322 Km. So the average speed is roughly 324 Km.
The best day to arrive at Hong Kong is Thursday and it would be best to avoid Sunday, as prices are on average 28.78% higher than on Thursday. (Average prices, based on 2830484 datapoints.)
We have a lot more statistics for flights CX 691 and between Hong Kong and Singapore.
