For 10/2 JFK-LIM-SCL-GRU-IGU, 10/6 IGU-GRU-SCL-LIM-JFK all on LAN codes flights, expedia shows "O" for the JFK-LIM and LIM-SCL legs, "H" for the SCL-GRU legs, and "Y" for the GRU-IGU legs, for $450 a.i., though a brutal 38 hr trip on the way back. If the booking classes displayed on expedia are correct, only the LIM-SCL legs would earn less than 100% in AA according to the AA LAN earnings table, but I have no first hand experience.