Originally Posted by 3544quebec

You can also get a domestic add-on in Argentine on LAN (coach) for the same price but no stopover in BUE according to the fare rules:

Los Angeles (LAX) to Iguazu (IGR) - Wed, Apr 9
American Airlines Inc. Los Angeles (LAX) to Miami (MIA) - Wed, Apr 9
American Airlines Inc. 200 Dep: 7:30AM Arr: 3:25PM 4h 55m Boeing 757 First (A)
Layover in MIA 5h 10m

American Airlines Inc. Miami (MIA) to Buenos Aires (EZE) - Wed, Apr 9
American Airlines Inc. 909 Dep: 8:35PM Arr: 6:25AM 8h 50m Boeing 777 Business (I)
Layover in EZE Thu, Apr 10 2h 40m
This flight contains airport changes

LAN Airlines Buenos Aires (AEP) to Iguazu (IGR) - Thu, Apr 10
LAN Airlines 4022 Dep: 9:05AM Arr: 10:55AM 1h 50m Airbus A320 Economy (Y)
OPERATED BY LANARGENTINA

Iguazu (IGR) to Los Angeles (LAX) - Fri, Apr 18
LAN Airlines Iguazu (IGR) to Buenos Aires (AEP) - Fri, Apr 18
LAN Airlines 4027 Dep: 2:10PM Arr: 4:05PM 1h 55m Airbus A320 Economy (Y)
OPERATED BY LANARGENTINA Layover in AEP 5h 55m
This flight contains airport changes

American Airlines Inc. Buenos Aires (EZE) to Dallas/Fort Worth (DFW) - Fri, Apr 18
American Airlines Inc. 996 Dep: 10:00PM Arr: 6:50AM 10h 50m Boeing 777 Business (I)
Layover in DFW Sat, Apr 19 2h 25m

American Airlines Inc. Dallas/Fort Worth (DFW) to Los Angeles (LAX) - Sat, Apr 19
American Airlines Inc. 2419 Dep: 9:15AM Arr: 10:35AM 3h 20m Boeing 737 First (A)

Cost per passenger (including taxes & fees) $1,918.62
Total cost for 1 passenger $1,918.62