I just tried booking EZE-SEA for early September. 14 different flights showed EZE-JFK in J and multiple options into SEA with one stop using miles on AS. Those stops included F for the next stop and F or Y into SEA. None were bookable. Calling the AS elite line got me nowhere. The agent from Boise was unwilling to even try to book my flights. Her response was AA was the problem because they wouldn't confirm the flights.