Sanchez was barred from leaving Cuba for the last decade. But she's taking advantage of the communist island's relaxation on travel restrictions.
Sanchez arrived in northeastern Brazil early Monday. She's expected to participate in the screening of a documentary on press freedom in Cuba in which she appears.
Sanchez's ability to travel was seen as a key test of Cuba's new travel law. It is one of the most significant reforms of President Raul Castro's ongoing plan to refashion some elements of the economy, government and society.
Other stops for Sanchez include the U.S., Mexico, Czech Republic, Germany, Italy, the Netherlands, Peru, Spain, Sweden and Switzerland.