What if my arrival airport changes?

Be kindly informed that there will be no problem if you change your arrival airport. Since the visa approval letter works at three international airports of Vietnam (Noi Bai International Airport in Hanoi, Tan Son Nhat International Airport in Ho Chi Minh City and Danang Airport in Danang City), you still get the visa stamped onto your passport at any of these three airport regardless of which you put in your visa application.