I am trying to figure out the best airpass to purchase. My itinerary is Santiago-Puerto Montt-Santiago-Buenos Aires-Iguazu Falls-Buenos Aires. I cannot find out how or who to contact about a Mercosur Pass and in fact read somewhere that it does not exist anymore. Anyone have any info. Our trip starts in late March through mid-April. I will be flying LAN/American but they route the Iguazu Falls flight through Lima and it takes over 9 hours!! Any ideas or experience would be appreciated.