Flight Pudong International Airport departs from Shanghai Pudong International Airport at 22:40 and arrives at Hanoi Noi Bai International Airport at 01:20.
The flighttime is about 3h 40m. The distance travelled ("as the bird flies"): 1828 Km. So the average speed is roughly 499 Km.
There is an 1 hour time difference between Shanghai and Hanoi