Marlboro County Jetport (IATA: BTN, ICAO: KBBP, FAA LID: BBP), also known as H.E. Avent Field, is a county-owned public-use airport located 3 nautical miles (5.6 kilometres) west of the central business district of Bennettsville, in Marlboro County, South Carolina, United States. Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned BBP by the FAA and BTN by the IATA.