San Marino: The country is entirely landlocked and doesn't have its own airport
Liechtenstein: The country is nestled between Switzerland and Austria also lacks its own airport
Nauru: This small island nation in the Pacific Ocean doesn't have a fully functional airport
Andorra: Nestled between France and Spain, Andorra doesn't have its own airport
Monaco: This tiny city-state on the French Riviera doesn't have an airport
Vatican City: This city doesn't operate regular commercial flights
Tuvalu: It doesn't have a fully operational airport