Vatican City Is the world's smallest country, which does not have an airport, It has a population of only 840 people
Monaco It is the 2nd smallest country in the world, it has the nearest airport Nice Cote D'Azur which is in France
San Marino It is the 5th Smallest country in the world with a population over 30000 people, The Closest Airport it has is Federico Fellini International Airport in Italy
Andorra It is situated in the Pyrenees mountains between France & Spain, They need to commute via air travel from Airports in these two countries
Lichtenstein It is landlocked between Switzerland and Austria And doesn't have its own commercial airport