For most cruises, you'll need a passport book that's valid for at least six months from the day your sailing ends. In some cases, you can use a passport card instead of a passport book, but that will only work if you plan to reenter the United States via your ship from Mexico, Canada, Bermuda or the Caribbean.

In 2026, the mandatory paperwork for a cruise depends on your itinerary, but a valid Passport Book is the universal requirement. Even if you are on a "closed-loop" cruise (departing and returning to the same U.S. port) where a birth certificate and ID might technically suffice, most lines now require a passport to protect you in case of an emergency medical evacuation. You must also check for visas and digital authorizations, such as the ETIAS for European ports or an ETA for the UK, which are strictly enforced in the latter half of 2026. Additionally, you will need your printed or digital boarding pass, a completed health declaration (if required by the line), and proof of travel insurance that specifically covers "cruise and evacuation" costs. If traveling with minors and both parents are not present, a notarized Parental Consent Letter is essential to avoid being denied boarding at the terminal.