Fly to Santiago de Chile's Commodoro Arturo Merino Benitez International Airport. There are other international airports you can fly into, such as Diego Aracena International Airport in Valparaiso, but you will have more travel options if you travel to Santiago de Chile.
Get another flight to the sprawling port city of Puerto Montt. This is most definitely not one of the attractions of the Patagonia, so plan to get in and out as fast as possible.
Take a ferry or another airplane to the coastal town of Chaiten. Chaiten has the look and feel of an Alaskan fishing village and provides a convenient path of entry into the wonders of the Chilean Patagonia.
Travel to the natural attractions of your choice either by car, boat or on foot. A popular destination is the town of Futaleufu, which is three and a half hour drive up the valley.