Flight Tan Son Nhat International Airport departs from Ho Chi Minh City Tan Son Nhat International Airport at 10:20 and arrives at Sihanukville Sihanoukville International Airport at 11:35.
The flighttime is about 8h 15m. The distance travelled ("as the bird flies"): 335 Km. So the average speed is roughly 41 Km.
There is an 7 hour time difference between Ho Chi Minh City and Sihanukville