Avianca S.A. (acronym in Spanish formerly for Aerovías Nacionales de Colombia S.A. (National Airways of Colombia), currently Aerovías del Continente Americano S.A. (Airways of the American Continent)) is the flag carrier airline of Colombia since December 5, 1919 when it was initially registered under the name SCADTA. It is headquartered in Bogotá, D.C. with its main hub at the El Dorado International Airport. Also Avianca is trademark comprising a group of seven independently IATA-coded and -owned Latin American airlines, whose operations are combined to function as one airline using a code sharing system. Avianca is the largest airline in Colombia and second one in Latin America: Avianca together with its subsidiaries has the most extended network of (both passenger and cargo) destinations in the Americas and one of the largest and most modern aircraft fleet in the continent. It is wholly owned by Avianca Holdings S.A., a Latin American holding company established in Panama and specializing in air transport. The company is part of the Synergy Group and is listed in the Colombia Stock Exchange.