Before you fly to Azerbaijan, you should keep in mind some important points. You should have enough amount of money in your hands before you apply to Azerbaijan, as there are many expenses to bear. Firstly, Visa application expenses, tickets, hotel reservations, and the stay itself in Azerbaijan can cost much. Secondly, you should bear in mind whether your passport is valid and not expired before you fly for Azerbaijan visa. Third most important issue to address is whether it is safe to travel to Azerbaijan or not. You should have your full insurance before you fly to Azerbaijan. Also, before you fly to Azerbaijan, make sure that Azerbaijan is not facing any political, economic or social instability as your trip might be ruined in these circumstances. Also, make sure there are no terrorism risks in country before you apply for Azerbaijan visa. Moreover, before you fly to Azerbaijan visa, check the weather prevailing in the area you are going to travel and keep your clothes and other belongings accordingly. You should also read their official rules and regulations that are to be observed by the visitors before you fly to Azerbaijan to avoid any unwanted situation.
There are different criteria of Azerbaijan visa application for some countries. You should check which visa type will suit you before you fly to Azerbaijan. Some countries can visit Azerbaijan without having its visa stamped. For US citizens, there is on-arrival visa at the airport for single entry for 30 days.