Do I need a passport or visa to enter?
U.S. citizens must have a valid U.S. passport to enter St. Lucia. Additionally, you should ensure your passport has a minimum of six months' validity before traveling to St. Lucia. For further information, travelers may contact the Embassy of St. Lucia at Tel: (202)364-6792/95, Fax: (202)364-6723, for the most current visa information.
All U.S, citizens traveling outside of the United States are required to present a passport or other valid travel document to enter the United States. This extended to all sea travel (except closed-loop cruises), including ferry service on June 1, 2009. Travelers must now present a Western Hemisphere Travel Initiative (WHTI) compliant document such as a passport or a passport card for entry to the United States. While passport cards and enhanced driver's licenses are sufficient for entry into the United States, they may not be accepted by the particular country you plan to visit; please be sure to check with your cruise line and countries of destination for any foreign entry requirements.
NOTE: Be aware that Caribbean cruises that begin and end in the U.S. (closed loop cruises) do not require that you travel with a valid passport. However, should you need to disembark due to an emergency and you do not have a valid passport, you may encounter difficulties entering or remaining in a foreign country. You may also have difficulty attempting to re-enter the United States by air because many airlines will require a valid passport before allowing you to board the aircraft. As such, it is strongly recommended that you always travel abroad with your valid passport.