How far in advance can I apply for a Vietnam visa? Follow Answer There is no limit as to how far in advance you can apply for a Vietnam visa. Published March 2017 Peninsula Visa Inc Related articles When does the Vietnam visa start? Closest Walk-in Facilities Near Our San Jose Office What are the Authorization Letters? Does the passport have to be signed when applying for a Vietnam visa? How far in advance can I apply for a China visa? Comments 0 comments Article is closed for comments.