Visa on arrival is a convenient way to get a visa to Vietnam for travelers who fly to Vietnam. You will need to obtain an approval letter to check in at the departure airport and to pick up the stamped visa once you arrive in Vietnam Airport. In order to get the visa approval letter, you will need to fill out an online visa application form, pay for service fee online to get visa letter issued by Vietnam Immigration via email in 1- 2 working days. You fly into Vietnam with this document, upon arrival, you pay for stamping fee with 2 passport photos to get stamped visa at Vietnam International airports.