Carnival guests cruising from one U.S. port to another U.S. port must have a valid Permanent Resident Card and are required to carry a passport valid for at least six months beyond the completion of ...

We’re going on a very short cruise from California to Mexico this spring. Do we need passports for our kids, even if we don’t get off the ship ... other types of ID documents.” ...

As of May 7, you'll need a REAL ID-compliant identification card or other approved ID to board a commercial aircraft. What if you want to take a cruise?