If we transit in Vietnam for several hours, do we need Vietnam visa? In case you have a connecting flight in Vietnam (please make sure that you will not leave Vietnam airports), you do not need to have Vietnam visa. Related Why should I use Vietnam Visa on arrival? Is Vietnam visa on arrival online legitimate? Should I apply visa in advance? Why do I need to have "Approval Letter"? What are visa procedures at Vietnam airport? What is Visa Approval code? Why do I need it? What is visa on arrival? Is that a problem if my passport is going to expired? Except for visa service fee, do I need to pay any fee at the airport? If yes, what is it What if my flight is changed and I arrive at another airport different with the one when I apply Visa on arrival?