Flight Tan Son Nhat International Airport departs from Ho Chi Minh City Tan Son Nhat International Airport at 20:30 and arrives at Yangon Yangon International Airport at 22:30.
The flighttime is about 2h 30m. The distance travelled ("as the bird flies"): 1175 Km. So the average speed is roughly 470 Km.
There is an 0.5 hour time difference between Ho Chi Minh City and Yangon