Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ho Chi Minh City to Caribbean as you normally would.
If you book a flight to Caribbean from Ho Chi Minh City, you will be flying from Ho Chi Minh City, which is the city’s only airport. Ho Chi Minh City (SGN) is located 7.3 km from the center of Ho Chi Minh City.