Do I need a visa for a 1-month trip to Vietnam or can I enter visa-free?

If you're unsure whether you'll stay a month or longer, it's better to get a 90-day e-visa in advance rather than figure it out locally later — safer and avoids extension hassles.

Getting a multiple-entry visa before the trip doesn't make sense for just 3 weeks — the visa-free period (up to 45 days for Russian citizens) fully covers short stays.

For a trip of exactly one month, many travelers skip getting a visa beforehand, though last-minute doubts arise about whether entering visa-free could cause issues.