If you take closed loop cruises (meaning your trip begins and ends at a U.S. port), you can sail to a variety of dreamy destinations as a U.S. citizen without a passport. For “closed-loop” cruises, U.S. citizens will need to provide: A boarding pass. A government photo I.D.

In 2026, U.S. citizens can still participate in "closed-loop" cruises—those that begin and end at the same U.S. port—without a formal passport book, provided the itinerary remains within the Western Hemisphere. Instead, you must present a government-issued photo ID and an original or certified copy of your birth certificate. However, this is heavily discouraged by travel experts. If an emergency occurs in a foreign port (such as a medical evacuation or a missed ship) and you are forced to fly home, you cannot board an international flight back to the U.S. without a valid passport book. Furthermore, certain destinations like Martinique or Barbados may require a passport regardless of the cruise type. For all other international itineraries, or for non-U.S. citizens, a passport valid for at least six months beyond the sailing date remains a mandatory requirement for boarding.