TACV currently has some great prices for the trip between Las Palmas and Praia. Las Palmas is part of the Canary Islands and for most award charts (including American and Delta) considered Europe.
The Cape Verde islands (which Praia) is a part of are considered Africa although both group of islands are off the coast of Senegal.
This $104 Round Trip costs as much as $800 for most days – the lowest I have seen before was $300.
TACV Cabo Verde Airline does not have any airline partners or is part of any alliance so the X fare ticket only earns on TACV club.