El Alto International Airport (IATA code: LPB) is La Paz's national and international airport and a principal hub for Línea Aérea Amaszonas and Transporte Aéreo Militar. It also serves as a focus city for Boliviana de Aviación, Bolivia's flag-carrier and largest airline. The airport is located in the city of El Alto and is () south-west of La Paz's city center. At an elevation of , it is the highest international airport and fifth highest commercial airport in the world. The runway has a length of . It is one of Bolivia's three main international gateways, along with Jorge Wilstermann International Airport and Viru Viru International Airport.