From Washington Dulles (IAD), United Airlines maintains a robust nonstop network to the Caribbean, focusing on major vacation hubs and capital cities. Key year-round and seasonal destinations include San Juan (SJU) in Puerto Rico, Nassau (NAS) in the Bahamas, Montego Bay (MBJ) in Jamaica, and Punta Cana (PUJ) in the Dominican Republic. They also offer direct service to St. Thomas (STT) in the U.S. Virgin Islands, St. Maarten (SXM), and Grand Cayman (GCM). For those looking for more "off-the-beaten-path" luxury, United operates nonstops to Aruba (AUA), Barbados (BGI), Providenciales (PLS) in the Turks and Caicos, and Nassau (NAS). It is worth noting that while some of these routes (like San Juan or Cancun) run daily, smaller islands like Barbados or St. Kitts may only have nonstop service on Saturdays or during the peak winter "high season." Travelers should also distinguish between Dulles (IAD) and Reagan (DCA) flights, as United’s primary long-haul international gateway for the region is exclusively centered at the Dulles hub.