Manassas Regional Airport (IATA: HEF or MNZ, ICAO: KHEF, FAA LID: HEF), also known as Harry P. Davis Field, is a city-owned public-use airport located four nautical miles (7 km) southwest of the central business district of Manassas, in a section of Manassas that was carved out of Prince William County specifically for the purpose of containing the airport.