Southwest Florida International Airport is a county-owned airport in the South Fort Myers region of unincorporated Lee County, Florida. The airport's market is Southwest Florida: Bonita Springs, Cape Coral, Captiva Island, Estero, Fort Myers, Marco Island, Naples and Sanibel Island. In 2015 passengers numbered 8,371,801. The airport is the second busiest single-runway airport in the United States after San Diego International Airport. It is a U.S. Customs and Border Protection port of entry.The airport sits on 13,555 acres of land just southeast of Fort Myers, making it the third-largest airport in the United States in terms of land size (after Denver and Dallas/Fort Worth). However, 6,000 acres of the airport's land includes swamp land that has been set aside for environmental mitigation. The airport code RSW means "Regional South-West" (for Southwest Florida Regional Airport). In 1993 the Lee County Port Authority renamed it Southwest Florida International Airport.
