All visitors must have valid passport including nationals of the United Kingdom, the USA and Canada. A return or on-going ticket is required.

U.S. Citizens
Under the Western Hemisphere Travel Initiative, special rules apply to U.S. citizens traveling to Mexico, Bermuda and certain destinations in the Caribbean*.

U.S. citizens traveling by air are required to have a passport to re-enter the States. Anyone traveling by land or sea needs to present either (a) a passport, passport card or WHTI-compliant document; or (b) a government-issued photo ID, such as a driver’s license, along with proof of citizenship, such as a birth certificate.

As of June 1, 2009, most U.S. citizens entering the United States at sea or land ports of entry are required to show a passport, passport card, or WHTI-compliant document. They will no longer be allowed to use a government-issued photo ID as proof of citizenship.

The U.S. government recommends traveling with a valid U.S. passport to avoid delays or misunderstandings while visiting other countries. A lost or stolen passport is also easier to replace when outside of the United States than other evidence of citizenship. 

For information concerning entry requirements, travelers can contact the Embassy of St. Vincent and the Grenadines, 3216 New Mexico Avenue, N.W., Washington, D.C. 20016, telephone (202) 364-6730, or the consulate in New York.

Canadian Citizens
A valid Canadian passport is required for Canadians intending to visit Saint Vincent and the Grenadines. The passport should be valid for at least six months beyond the date of your expected departure from the country. Canadians must also be in possession of a return airline ticket and proof of sufficient funds. A tourist visa is not required.

These requirements are subject to change at any time. In order to avoid delays and misunderstandings, the Canadian government strongly recommends that its citizens travel with a passport valid for six months after their arrival date. It is the only universally accepted identification document, and it proves that they have a right to return to Canada.

Some airlines require Canadians to present their passport when returning back to Canada. It is strongly recommended that travelers verify these requirements directly with their airline before departure. It is the traveler's responsibility to check with the country's embassy or its consulates for up-to-date information.

Sources
U.S. State Department: http://travel.state.gov/travel/
Canadian Consular Affairs: http://www.voyage.gc.ca/consular_home-en.asp
St. Vincent-Grenadines tourism: http://www.svgtourism.com/