We booked our trip to Chile and Argentina using Delta SkyMiles which worked out fine for the flights to/from the US but making the best use of our miles intra-Argentina required some research.
We’ll start with a quick recap from our post on booking the itinerary (Delta SkyMiles to Argentina: How to book Aerolineas Argentinas Award Space). If you want to get from the U.S. to Argentina (and you’re using Delta SkyMiles, KLM/Air France Flying Blue points or other SkyTeam currency), you’ll have the following choices for the long-haul flights:
Aerolineas Argentinas: 1x daily from New York-JFK to Buenos Aires-EZE Aerolineas Argentinas: 2x daily from Miami-MIA [...]