Vatican City is not only an independent city-state, but it's also the smallest country in the world. The 109-acre spot does not have its own airport, likely because it is actually “enclaved” within Rome.

There is no airport in Vatican City primarily because the country is far too small to accommodate one. As the smallest sovereign state in the world, the Vatican covers only 0.17 square miles (44 hectares), an area smaller than many major airport terminals or parking lots. To put it in perspective, you could fit nearly 30 Vatican Citys into the land area of Chicago O'Hare Airport alone. There is simply no flat, open land long enough for a runway, and much of the territory is occupied by dense historical landmarks like St. Peter's Basilica and the Vatican Museums. Furthermore, the city is entirely surrounded by the city of Rome, which already has two major international airports—Fiumicino (FCO) and Ciampino (CIA)—both of which are less than 30 minutes away. While the Vatican does have a small, private heliport used by the Pope and visiting heads of state, all commercial and diplomatic air travel for the Holy See is handled through Italy’s existing aviation infrastructure, benefiting from the open border between the two nations.