Travel Passes for Internal Flights?


Some friends of mine are coming down from NYC and are thinking to do a couple of trips while here (Calafate, then either Salta or Iguazu depending on time)

Does anyone know if there are any flight packages for tourists anymore? I know TAM used to offer them for Brazil -- do either LAN or Aerolineas offer them? If so, how do they work? Is there a minimum amount of flights that you have to do in order to get a package?