Oh, Gary, Gary...Please see this thread for all kinds of information (both good & bad) about flying with dogs into Chile.
http://www.allchile.net/chileforum/topic2312.htmlWe brought in 3 dogs and a cat, but we came from Mexico and we used a pet transport agency to coordinate all the papers & help us with transport, so our experience isn't like yours will be. Our pets were on the same plane(s) as we were, but were not allowed in the cabin. It was almost a disaster because one dog kennel was declared "too big" by the airline in Mexico City (though no fault of pet transport agency's, in fact they saved the day). What you will find here at AllChile is mostly personal experiences and good tips, but you need to do your homework and be prepared. So check your airline's regulations (very important) and the Aphis regulations (there's a link in the thread), and have all your doggie's papers in order. Wishing you luck!