Is it legal for United States citizens to travel to Cuba?
Yes. There are several categories which are discussed thoroughly at http://www.cubatravelexperts.com/faq01.html. Even U.S. citizens going on their own through Canada, Mexico, etc., have reported few problems upon returning. If you take the independent route, however, we recommend not showing up at U.S. customs with your pockets or suitcases stuffed with Cuban cigars, which are illegal to import. You can stay within the law even by going on your own. Just be sure you know what the law is.