Skyteam FRA - GRU with stop in US, $600 3.0cpm
This is the infamous Europe-South America fare that has been around for quite a while. I just priced FRA-MSP-GRU-ATL-FRA for $600 in April/May. Needs to get booked through a travel agent to get that price. Yields 20400 MQM.
https://goo.gl/flights/kTvL