This is a simple map of Vietnam to give you an idea of the basic geography.
Most of the main areas and popular places of interest are shown.
All international flights arrive and depart from ... Hanoi and Ho Chi Minh airports.
For domestic flights there are airports at the following locations shown on the map ...
Hanoi - Haiphong - Dien Bien Phu - Vinh - Hue - Danang - Qui Nhon - Nha Trang - Dalat - Ho Chi Minh and Phu Quoc Island.
For more detailed maps of Vietnam with major transit routes and a topographical layout download versions as shown below.