ENAIRE, formerly known as AENA (Aeropuertos Españoles y Navegación Aérea), is the Spanish public body that owns and operates the majority of airports in the country, with the exceptions of the privately owned Ciudad Real and Lleida-Alguaire airports. ENAIRE is also responsible for Air Traffic Control throughout Spain while the body's proprietary ATC system is called SACTA. Its head office is located in Madrid.
Currently ENAIRE is undergoing a major airport expansion program. A US$2.2 billion new terminal of Madrid Barajas International Airport was inaugurated in 2006.Barcelona International Airport's new T1 terminal was completed in 2009, for US$1.7 billion.Alicante Airport is due to expand soon with a €570 million terminal expected to open in 2011 and Málaga Airport is undergoing an expansion with various investments planned until 2013, with the completion of Terminal 3 in June 2010. Other airports on the network will be expanded to accommodate the increasing air traffic demand.