No, in 2026, you must have a valid passport (or a NEXUS/SENTRI card in some specific cases) to travel from the U.S. Virgin Islands (St. Thomas, St. John, St. Croix) to the British Virgin Islands (Tortola, Virgin Gorda, Jost Van Dyke). While the USVI is a U.S. Territory and U.S. citizens only need a birth certificate and ID to enter from the mainland, the BVI is a British Overseas Territory and is considered a foreign country. When you take the ferry from Red Hook or Charlotte Amalie to Road Town, you will pass through BVI Immigration and Customs, where a passport is strictly required. A grounded "reality check": even for a day trip to the famous "Baths" on Virgin Gorda, you cannot board the ferry without your passport in hand. Furthermore, upon your return to the USVI, you must clear U.S. Customs and Border Protection. If you don't have a passport, you are legally restricted to staying within the USVI, though you can still enjoy beautiful "passport-free" boat trips to nearby islands like Water Island or Buck Island.