Avianca is having another great sale from New York (JFK) to Sao Paulo, Brazil and Buenos Aires, Argentina with round trip tickets for $1313 to Buenos Aires!
I have flown with Avianca on several occasions on their Boeing 787s and Airbus 330s. Several of the Airbus models have direct aisle access for all seats, which is standard on the Boeing 787.
Be very careful when picking flights from JFK to Bogota (BOG) as several flights are operated by WAMOS Airlines, a Spanish charter airline which operates a significantly inferior product and can cause some issues in mileage crediting to non Lifemiles mileage accounts.
Flight with WAMOS on the return.
Flight with Avianca metal the whole way.
Here are some links to Trip Reports on Avianca on their Boeing 787 from GRU-BOG and Avianca 330 from BOG-JFK.
Avianca Airbus 330 Business Class
Avianca Boeing 787 Business Class