Ho Chi Minh City commonly known as Saigon, is the largest city in Vietnam and the former capital of the Republic of Vietnam (South Vietnam).
Tan Son Nhat is Vietnam's largest international airport also situated in Ho Chi Minh.
There are two terminals: the new international terminal took over all international flights, and the old terminal, which will be reserved for domestic traffic.
You can take many flights to Hue, Danang and other many cities of Vietnam.