South Korean citizens don't need a visa for Vietnam.
South Korean citizens can visit Vietnam without a visa for up to 45 days from the date of entry, whatever the purpose of the trip. The exemption runs until 14 March 2028.
No visa neededStayUp to 45 days
Good to know
Staying longer than 45 days? Get a Vietnam e-Visa before you travel - it allows up to 90 days.
Your passport should be valid for at least 6 months after the day you arrive.
Check the stamp in your passport at the border: the leave-by date should be 45 days from your arrival.
Entry conditions can change at short notice, so check again close to your travel date.