Dual nationality

Dear Ashley kim, 

Thanks for your concern,

For you first entry Vietnam offers 15-day visa exemptions with single entry for visitors from south korea.. However, their passports should have at least six months of validity upon the date of arrival to meet airlines’ requirements, and their arrival date is NOT within 30 days from their last exit date with visa exemption. Otherwise, they will need a Vietnam visa.

For second entry you can use your USA passport and apply for 1 month single entry tourist visa at that link https://www.vietnam-evisa.org/apply-e-visa.html

Apply visa online, You will get visa stamp on the passport upon arrival, All you need to do is fill your information in the form and make payment online.
After that, we will send You the approval letter via email, please print it out to board the plane and use it to get visa stamp on the passport upon arrival.

For any further details, please contact us at visa@vietnam-evisa.org or call us at (+84) 909 343 525

Best Regards
Stepfanno Tran (Mr .)