Yes, for travelers flying from the United States or any other country outside the Caribbean, St. Lucia is strictly an international flight. Because St. Lucia is an independent island nation, you are required to clear both immigration and customs upon arrival. This means you must possess a valid passport that is valid for at least six months beyond your stay, and you may be asked to provide proof of a return ticket or sufficient funds for your trip. Even if you are flying from a nearby U.S. territory like Puerto Rico or the U.S. Virgin Islands, the flight to Hewanorra International Airport (UVF) or George F.L. Charles Airport (SLU) is international in nature. In 2026, many major U.S. carriers like JetBlue and American Airlines offer direct "international" service to the island. It is important to treat it as such by arriving at your departure airport at least 3 hours early to accommodate the additional document checks and security protocols required for global travel.