To enter Vietnam you will require a passport (with at least six-months remaining validity) and a tourist visa. This visa must be obtained prior to arrival. A combined entry/exit and baggage declaration form will be issued to you prior to arrival and this must be retained until your departure from Vietnam. Tourist visas allow visitors to enter and exit Vietnam at airports or at land borders with Cambodia and China and Laos. Tourist visas are valid for a single 30-day stay. The governmentoften talks about issuing visas on arrival to certain favoured nationalities 

I > By Air

Airports

* Tan Son Nhat Airport
* Noi Bai Airport
* Danang Airport
* Phu Bai Airport

II > By Land

Vietnam - Cambodia border:

* Moc Bai International Check Point (Tay Ninh Province)
* Vinh Xuong International Check Point (An Giang Province) by water way on Mekong Delta River
* Tinh Bien International Check Point (An Giang Province) by water way on Mekong Delta River

Vietnam - China border:

* Friendship Gate International Check Point (Lang Son Province)
* Lao Cai International Check Point (Lao Cai Province)
* Mong Cai International Check Point (Quang Ninh Province) by sea way

Vietnam - Lao border:

* Lao Bao International Check Point (Quang Tri Province)
* Cau Treo International Check Point (Ha Tinh Province)
* Nam Can International Check Point (Nghe An Province)

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* Tourist visa is valid in 30 days.
* Visa is issued at the Vietnamese diplomatic offices or consulates in foreign countries. Visa is possibly issued at the border gates to those who have written invitations by a Vietnamese competent agencies or tourists in the tours organized by Vietnamese international travel companies.
* Application files for visa: the entrance application (printed form); two 4x6 cm photos; passport and fee for the visa issuance.

Processing a tourist-visa application typically takes four or five working days in countries in the West.
It is easer possible to arrange a visa on arrival through a Vietnamese travel agent. They will need passport details in advance and will send a confirmation for the visa to be issued at your airport of arrival. cost around US $ 20