El Dorado International Airport (IATA: BOG, ICAO: SKBO) is an international airport located in Bogotá, Colombia. It is the largest Latin America airport in terms of cargo movements with 593,946 tons (2010) and the third in terms of passenger traffic, only behind São Paulo-Guarulhos International Airport and Mexico City's Benito Juárez International Airport, transporting 18,934,203 passengers in 2010; as well as the largest airport in Colombia and the main international and domestic air gateway in the country, serving as an important hub for Avianca (the national flag carrier of Colombia), Copa Airlines Colombia, Aires, Satena, EasyFly and other cargo companies. It is managed by Operadora Aeroportuaria Internacional (OPAIN), a consortium composed of Colombian construction and engineering firms and the Swiss Flughafen Zürich AG. El Dorado is, politically and economically, the most important airport in Colombia and serves as the nation's primary international gateway, accounting for 49% of the total air traffic in the country. It handles all domestic and international flights into Bogotá and boasts the world's third largest landing field 6.9 square kilometres (1,700 acres) of land. El Dorado is located about 15 kilometres (9.3 mi) west of the city center; Avenida El Dorado (26 street), one of the fastest highways in Bogotá, provides passengers access to downtown. At the end of the year 2008 construction of a new TransMilenio line started, which will connect the airport with the mass transportation system of the city.