Traveling to the Bahamas without a passport isn't possible in any case. Whether you cruising on a close loop cruise, via an airliner, or any other source, you'll need a passport for the Bahamas in all cases.

If you are a U.S. citizen in 2026, the only way to visit The Bahamas without a passport is via a "Closed-Loop" cruise. This is a cruise that begins and ends at the same U.S. port (e.g., Miami to Miami). Under the Western Hemisphere Travel Initiative (WHTI), you can enter The Bahamas and return to the U.S. using a government-issued birth certificate and a valid government-issued photo ID (like a driver's license). However, if you are traveling by air, a passport is strictly required for all international flights. Even on a cruise, travel experts in 2026 strongly recommend carrying a passport; if you have a medical emergency or miss the ship and need to fly home from Nassau, you will be unable to board a plane without a valid passport book. Additionally, some specific excursions or private islands may have tighter security, so while the birth certificate "loophole" still exists for sea travel, the passport remains the "gold standard" for a hassle-free Bahamian vacation.