Traveling to Cancun by Air: Passport Book Strictly Required
If you are flying from the United States to Cancun International Airport (CUN), a valid US passport book is 100% mandatory for all travelers, including infants and children. A passport card is NOT valid for international air travel.
Closed-Loop Cruises to Cozumel / Cancun: The Western Hemisphere Exception
If you take a "closed-loop" cruise that departs and returns to the same US port (e.g. Miami to Cozumel/Cancun and back to Miami), US citizens can enter using an official government birth certificate and a government-issued photo ID (like a Real ID driverโs license). However, a passport book is still strongly recommended in case of medical emergencies requiring air evacuation.
