From PR to visit other neighboring islands is the same as flying from mainland US. If you need a passport, you need a passport. If you need a Visa, you need a

From PR to visit other neighboring islands is the same as flying from mainland US. If you need a passport, you need a passport. If you need a Visa, you need a Visa. It might be cheaper or a shorter trip. But besides that it's the same. -- Unless you take a cruise I guess.