Do you need a return ticket to enter Vietnam with an e-visa?

Return/onward tickets may be checked before boarding, not just at the Vietnamese border — airline staff in the departure country sometimes ask to see a return ticket if you don't already have a visa arranged in advance.

For a cheaper return-ticket reservation instead of buying a refundable ticket, the Backtickets service is mentioned.

For single-entry visas, officers may additionally request a full itinerary, round-trip tickets, hotel booking confirmations, or travel agency details.

If you don't have a return ticket, buying a cheap onward ticket on the spot — for example to Thailand — is possible, but there is no guarantee the border officer will accept it. Having it prepared in advance is safer.

Even with a multi-entry e-visa, border officers may ask for a return ticket. An unconfirmed booking is not always accepted — a fully paid ticket is safer.

If your outbound flight is on June 1st and your return is June 29th, make sure the return ticket is flexible or exchangeable. If denied entry, the airline will fly you back — but only if the ticket allows a same-date change.

In some countries a bus ticket is accepted as proof of onward travel — the key is showing you will leave the country. In Vietnam requirements can vary by border officer, so a paid ticket is more reliable.

With a valid visa (not visa-free entry), a booking confirmation might be accepted, but there is still a risk. A paid ticket significantly reduces the chance of issues at the border.