TAP /Aerolíneas Argentinas are having a nice sale ex-Buenos Aires to Lisboa and includes service with TAP on their brand new Airbus 330-900 Neos between Sao Paulo and Lisboa.
Lisbon is a lovely city see our Trip Report here and serves as an easy base to explore Europe.
This fare books into TAP J Class which credits at 200% to a variety of carriers. So on this trip you would earn 19660 miles in many Star Alliance programs for the LIS-GRU segments.
Here is a Trip Report on their Airbus 330 from Sao Paulo to Lisboa and a Trip Report from Lisboa to Munich (which highlights the intra-Europe service)
Airbus 330 Neo Business Class