hi there,
Flights to Puerto Rico usually go through San Juan's international airport. It's the Caribbean hub of a number of different airline companies, such as Continental, Delta and American Airlines.
American cities offering
direct flights include Boston, Chicago and L.A., and New York City.
Puerto Rico is the least expensive of the islands in the Caribbean so if you're looking to travel on a budget, you should consider heading to other Caribbean destinations such as
Barbados or Aruba.