Flight Tan Son Nhat International Airport departs from Ho Chi Minh City Tan Son Nhat International Airport at 08:00 and arrives at Guangzhou Guangzhou Baiyun International Airport at 11:40.
The flighttime is about 2h 40m. The distance travelled ("as the bird flies"): 876 Km. So the average speed is roughly 328 Km.
There is an 1 hour time difference between Ho Chi Minh City and Guangzhou