Atlanta is currently listed as the busiest in terms of take offs and landings. Whether or not it is the "main" US airport depends on what criteria you are using. Certainly JFK, LAX, ORD, DCA and IAD are also important airports in the sense of the cities and populations they serve.
The main airport in Dublin Ireland, is called Dublin Airport.
The main airport in Paris is the Roissy Airport (Paris-Charles de Gaulle Airport).
The main airport in Maui is Kahului Airport. This airport is the second busiest airport in the entire State of Hawaii.
Yes, Christchurch does have an airportadd. Its airport is the main gateway for the US Deep Freeze operations in the Antarctic. otherwise it is a normal international airport, with the facilities that implies.
Zvartnots Airport.
There are eight major airports in Tunisia. Monastir-Habib Bourguiba International Airport is the main airport in Tunisia.
Cluj-Napoca airport
Barcelona Airport is the main airport in Barcelona, Spain. It is commonly referred to as El Prat Airport.
The main airport in Alabama is Birmingham-Shuttlesworth International Airport.
Dublin Airport is the main airport in Ireland.
edinburgh airport
Entebbe Airport main airport for Uganda