See posting from 18Jul17:
ROUTE UPDATES: Buenos Aires Aeroparque (AEP) international flights to move to Ezeiza (EZE) (except Uruguayan flights)
The first phase commenced on 03May18 with the total number of international flights to Bolivia, Brazil, Chile, Paraguay operating from Aeroparque being reduced from 222 to 112 operations weekly. Reductions by airline in terms of weekly flights:
Aerolineas Argentinas / Austral - 120 to 60
LATAM Argentina / Brasil / Chile - 70 to 35
Gol Linhas Aereas - 21 to 11
Amaszonas Paraguay - 11 to 6
Aerolineas Argentinas transferred its flights bound for Porto Alegre (POA), Río de Janeiro Galeao (GIG), Salvador de Bahía (SSA) and Santa Cruz de la Sierra (VVI) from Aeroparque to Ezeiza.
Aerolineas will continue to operate from Buenos Aires Aeroparque (AEP) to Asuncion (ASU), Curitiba (CWB), Sao Paulo Guarulhos (GRU), and Santiago (SCL) until 2019.
The remaining 50% of international flights by all carriers are due to be moved on 01Apr19.
The purpose of the big move is to free up ramp space and to a certain extent air operations capacity at Buenos Aires Aeroparque (AEP) for the increasing number of Argentine domestic flights being added by carriers under the present government's policy of doubling the number of Argentine air travelers in the foreseeable future.
http://www.sirchandler.com.ar/2018/05/arranco-la-desregionalizacion-de-aeroparque/ including ANAC press release