Luis Munoz Marin International Airport — San Juan, Puerto Rico

Luis Munoz Marin International Airport, coded SJU, honors Puerto Rico's first governor elected by popular vote, a figure credited with steering the island through mid-20th-century industrialization. Located in Carolina just east of San Juan, the airport ranks among the busiest in the Caribbean basin, functioning as a critical transfer point for travelers island-hopping toward smaller Leeward and Windward destinations that lack direct long-haul service. JetBlue operates one of its largest focus cities here, complementing extensive American Airlines and Delta schedules linking San Juan to the U.S. mainland. Cruise passengers add another layer of traffic, since San Juan's harbor is one of the region's leading embarkation points, meaning SJU sees visitors connecting between flights and ships within the same day. Post-hurricane infrastructure upgrades have reinforced the terminal's resilience, underscoring the airport's role as Puerto Rico's indispensable link to the outside world.