From UAL Press Release (Condensed)

Chicago - Beginning Oct. 31, 2005, United is scheduled to offer customers additional daily nonstop service between its airport hub at Washington Dulles International Airport and Varig's hub, São Paulo Guarulhos International Airport in Brazil. 

Both Washington Dulles-São Paulo flights will be operated with B767-300 aircraft, configured with United First 10 seats, 32 United Business seats, 71 seats in Economy Plus and 80 seats in United Economy.

Flights opened for sale on April 2. 

Service between Washington Dulles and São Paulo