Changing your destination airport will not affect your visa application. But if you want to change, consider carefully to avoid any problems that may arise. The visa approval letter works at 08 international airports of Vietnam (Hanoi, Van Don, Da Nang, Ho Chi Minh City, Khanh Hoa, Can Tho, Hai Phong, Da Lat). Therefore, you can completely get a visa upon arrival at one of these 8 airports.
