Flight Guarulhos International Airport departs from Sao Paulo Guarulhos International Airport at 19:45 and arrives at Buenos Aires Ministro Pistarini International Airport at 22:45.
The flighttime is about 16h 00m. The distance travelled ("as the bird flies"): 1542 Km. So the average speed is roughly 96 Km.
There is an 11 hour time difference between Sao Paulo and Buenos Aires