Flight Pudong International Airport departs from Shanghai Pudong International Airport at 08:45 and arrives at Ho Chi Minh City Tan Son Nhat International Airport at 12:00.
The flighttime is about 4h 15m. The distance travelled ("as the bird flies"): 1901 Km. So the average speed is roughly 447 Km.
There is an 1 hour time difference between Shanghai and Ho Chi Minh City