If you plan on visiting more than a couple of countries in the region of South America, it will be more practical if you get a multi-country air pass. Get a Mercosur Air Pass. You can save a lot of money with this Option, rather than buying individual tickets.

Mercosur Air Passes lets you travel extensively on eight different airlines to Argentina, Brazil, Chile, Paraguay and Uruguay. Just like the rule of Eurail Pass' purchase outside of Europe, you can only purchase Mercosur Passes outside South America.

Prices vary, depending on air miles travelled. For flight details, booking rules & regulations, check out Varig Brasil's official site.

If you organize your itinerary well, this travel option will definitely be even cheaper than the local passes available. Do your research, shop around, book and save money!