Flight Hong Kong International Airport departs from Hong Kong Hong Kong International Airport at 21:00 and arrives at Shanghai Pudong International Airport at 23:40.
The flighttime is about 2h 40m. The distance travelled ("as the bird flies"): 988 Km. So the average speed is roughly 370 Km.
The best day to arrive at Hong Kong is Wednesday and it would be best to avoid Thursday, as prices are on average 97.59% higher than on Wednesday. (Average prices, based on 13027711 datapoints.)
We have a lot more statistics for flights HX 234 and between Hong Kong and Shanghai.