?? Passport Requirements: US Cruises: If you are a US citizen sailing on a closed-loop cruise (departing from and returning to the same US port), you won't explicitly need a passport. A government-issued photo ID (such as a driver's license) and proof of citizenship (like a birth certificate) will generally suffice.

Whether you can leave a cruise ship at a port of call without your physical passport depends on the local regulations of the country you are visiting and the specific instructions of the cruise line. For "Closed-Loop" cruises (starting and ending at the same U.S. port) visiting most Caribbean islands or Mexico, you can often go ashore with just your Key to the World card (ship ID) and a government-issued photo ID (like a driver's license). The ship's manifest acts as a collective "visa" for the passengers. However, in most European, Asian, and South American ports, you must carry your physical passport or a clear photocopy to clear local immigration if requested. In 2026, many cruise lines have moved toward "Digital Passports" via their apps, but local authorities in many regions still require the physical document. It is vital to check the ship’s daily newsletter or the app before disembarking, as being stuck in a foreign port without your passport if the ship sails without you is a logistical nightmare that can take weeks to resolve.