According to Airliners.net forum, Turkish Airlines will deploy its Airbus A350-900 on Istanbul-Sao Paulo-Buenos Aires route beginning July 14th 2020, replacing 777-300ER.
In terms of capacity, it will be a small reduction from Boeing 777-300ER’s layout 49 Business Class / 300 Economy to Airbus A350’s 32 Business / 297 Economy, but a better premium experience in Business Class with a 1-2-1 layout (2-3-2 currently on the 77W). Sao Paulo and Buenos Aires join the growing list of TK A350-900 destinations, after London Heathrow, Dubai, Los Angeles, Seoul, Montreal, New York JFK, Washington Dulles and Bangkok, as well as Manila.
Istanbul – Sao Paulo Guarulhos, effective July 13th
TK193 IST1315 – 2055GRU 359 / Monday, Wednesday, Saturday
TK194 GRU2235 – 1710+1IST 359 / Monday, Wednesday, Saturday
Istanbul – Sao Paulo Guarulhos – Buenos Aires, effective July 14th
TK015 IST0940 – 1710GRU1830 – 2130EZE 359 / Tuesday, Thursday, Friday, Sunday
TK016 EZE2255 – 0130+1GRU0310+1 – 0940+1IST 359 / Tuesday, Thursday, Friday, Sunday