Flight Guarulhos International Airport departs from Sao Paulo Guarulhos International Airport at 12:55 and arrives at Buenos Aires Ministro Pistarini International Airport at 16:05.
The flighttime is about 15h 10m. The distance travelled ("as the bird flies"): 1542 Km. So the average speed is roughly 102 Km.
There is an 12 hour time difference between Sao Paulo and Buenos Aires