This year I flew economy from GIG to EZE on Emirates and decide next year to do it in j/f , it is very expense for emirates on the GIG -EZE route , also qatar operate a 777 -200 lr GRU-EZE which is just as expensive also turkish operate a 777-300er GRU-EZE at halfthe price of J of the middle eastern carriers ^, you could always get a cheap flight down from GIG-GRU and then connect as most of the flight are late at night ...... That is if you are planing on flying down to EZE from Brazil