Avianca S.A. (acronym in Spanish for "Aerovías del Continente Americano S.A.", Airways of the American Continent) has been the national airline and flag carrier of Colombia since 5 December 1919, when it was initially registered under the name SCADTA. It is headquartered in Bogotá, D.C. with its main hub at El Dorado International Airport. Avianca also comprises a group of seven 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 largest in Latin America. Avianca together with its subsidiaries has the most extensive network of destinations in Latin America. It is wholly owned by Synergy Group S.A., a South American holding company established by Germán Efromovich and specializin