Do I need a separate visa for Vietnam, Cambodia and Thailand on one trip?

No. Vietnam, Cambodia and Thailand each have their own entry rules, so you need to check every country separately. There is no shared visa like the Schengen area, so a Vietnam e-visa covers Vietnam only.

Your nationality decides each answer. A UK passport, for example, is exempt for 45 days in Vietnam, but Cambodia and Thailand have their own rules and fees. Check each government's official site before you book.

For Vietnam, an e-visa lasts up to 90 days and is valid only for the dates you choose. If you enter Vietnam twice on the trip, for example Vietnam, Cambodia, then back to Vietnam, apply for a multiple-entry e-visa so you can re-enter without a new application.

You can compare options on our visa requirements page and read how the single and multiple entry choices work. VietnamVisa.com is a private visa agency, not a government website. You can apply yourself at evisa.gov.vn for US$25 (single entry) or US$50 (multiple entry).