as i know i cannot redeem miles for just 1 return trip by WW partner. they write:

Valid: All eleven oneworld carriers may be used on one award as long as the mileage and segment maximum is not exceeded (see distance range). Travel must include at least two oneworld partners other than American Airlines, American Eagle® or AmericanConnection®, and may not exceed 16 segments. The number of miles redeemed varies depending on the distance and class of service traveled. To determine the award for your travel plans, please call AAdvantage Reservations with your complete itinerary, and one of our helpful service representatives will calculate the miles you are flying and advise you of the correct award to use.

but if i want just lan flight scl-ipc-scl i need to book + 1 flights by different partner, but nobody in WW have flight to scl exept lan %((.