Lots of focus on Portugal to Brazil right now given Azul starting up VCP-LIS/OPO and TAP's very aggressive pricing strategy for business class globally.

Worth noting that LatAm's Z class fare (Fare Basis ZEEEV00Q) from LIS-GRU includes stopovers (with no time limit) at USD 100 each, the ability to use BA and IB flight numbers in Europe and the ability to fly to South America from Europe on any LatAm flight number (i.e. Iberia and British airways flights are both eligible).

This means you could fly LIS-LHR on BA I class, and then a month later fly LHR-GRU on a LA coded flight in Z class. Same thing for flying via MAD with IB.

Long story short: this is yet another cheap LAN business fare that allows for a lot of creativity.