Flight Pudong International Airport departs from Shanghai Pudong International Airport at 07:10 and arrives at Hong Kong Hong Kong International Airport at 10:00.
The flighttime is about 2h 50m. The distance travelled ("as the bird flies"): 988 Km. So the average speed is roughly 349 Km.
The best day to arrive at Shanghai is Sunday and it would be best to avoid Saturday, as prices are on average 52.73% higher than on Sunday. (Average prices, based on 2792232 datapoints.)
We have a lot more statistics for flights KA 857 and between Shanghai and Hong Kong.