Ballykelly Airfield is a former military airfield located in County Londonderry, Northern Ireland. Originally built during World War II, it served as a base for the Royal Air Force and later the United States Air Force. The airfield has a long runway and various facilities that supported military operations. After its closure, Ballykelly Airfield was repurposed for civilian use and is now primarily used for general aviation. The site has also been considered for various development projects, reflecting its strategic location and historical significance in the region.