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Argentina has direct flights between North America, the UK, Europe, Australia and South Africa, and from nearly all South American countries. You can also fly to a neighboring country, such as Brazil or Chile, and continue overland to Argentina.
Most international flights arrive at Buenos Aires’ Aeropuerto Internacional Ministro Pistarini, which is a 40- to 60-minute shuttle bus or taxi ride out of town (35km).
Close to downtown Buenos Aires is Aeroparque Internacional Jorge Newbery, which handles mostly domestic flights but also a few international ones from neighboring countries.
There are several other international airports around Argentina. Basic information on most Argentine airports can be found online at Aeropuertos Argentina 2000.
Aerolíneas Argentinas is the national carrier and has a decent international reputation.