Yes, you absolutely need a valid passport to enter Antigua and Barbuda if you are arriving as a tourist from outside the Caribbean. For citizens of the US, UK, Canada, and the EU, your passport must be valid for at least six months beyond your date of departure. While some cruise passengers were historically allowed to use other forms of ID for "shore excursions," in 2026, the local government and most major cruise lines strictly require a physical passport for all international arrivals. Additionally, you must be able to show a confirmed return or onward ticket and proof of accommodation upon arrival. If you are a citizen of a country that is a member of the OECS (Organization of Eastern Caribbean States), you may be able to travel using a government-issued National ID card, but for the vast majority of international global travelers, a passport is the only acceptable travel document. Always check if you require a visa; however, most Western travelers are granted a "visa on arrival" for stays up to 90 days.