Are there any low cost airlines in South America?
I am going there next year & want to know the best/cheapes/quickest way to get around?
The only true "low-cost" airline in Latin America is Gol, which is a Sao Paulo-based airline. The bad news is that in keeping with the low-cost model, they do not offer much in the way of service outside of Brazil, except to Buenos Aires.
If you’re looking to travel between two points in two different countries, then there are only three airlines with service and a safety record that would merit a recommendation:
1) TAM (Based in Brazil)
2) TACA (Based in El Salvador)
3) LAN (Based in Chile, Argentina and Peru)
The only problem is that these are not "low-fare" airlines in the sense of their distribution, meaning they all still follow the old ways where the lowest fares were only sold through preferred travel agencies—meaning that many times you will not get these fares over the internet. (This also has to do with the low penetration rate of internet households in Latin America)
Therefore, just follow the basic rule of thumb when picking an airline, which is that airlines that DO NOT offer the best schedule generally compensate to get traffic in that route by offering a lower fare.
Example: If you are flying from Miami to Sao Paulo, you will find that the highest fare of the above airlines is on TAM, because they offer nonstop service. But if you check with LanChile with a connection over Santiago, you will get a lower fare. (Conversely, if you look for a low fare from Miami to Santiago, try TAM connecting via Sao Paulo rather than nonstop on LAN!)