Flight Dulles International Airport departs from Washington Dulles International Airport at 22:35 and arrives at Sao Paulo Guarulhos International Airport at 09:30.
The flighttime is about 9h 55m. The distance travelled ("as the bird flies"): 4337 Km. So the average speed is roughly 437 Km.
There is an 1 hour time difference between Washington and Sao Paulo