TAP is having a nice sale ex-Boston to Stockholm via Ponta Delgada in the Azores and Lisbon, Portugal. Flights start at just $684 and include service on their brand new Airbus 321 Neos.
This fare books into TAP J Class which credits at 200% to a variety of carriers. So on this trip you would earn 20648 miles in many Star Alliance programs.
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) Here is a Trip Report around Ponta Delgada from a previous fare sale.
Airbus 321 Business Class