TAP continues their string of good deals with an offer for return flights from London, UK to Sao Paulo, Brazil for as low as 362 GBP! That works out to a cost of just about 3 Cents (Pence) Per Mile flown.
As usual, the flights have a stopover in either Lisbon or Porto in both directions. Depending on the flights you choose, the stopover can be up to 24 hours long, so you can go out and explore the city while you wait for your connecting flight.
The fare only includes carry-on luggage, so you will need to pay extra if you want to check bags.
Availability is a bit limited, but November 2020 seems to still have the most dates with good prices. Here is a sample itinerary in late November (Nov 13 – Nov 27):