Miami University Airport (IATA: OXD, ICAO: KOXD, FAA LID: OXD) is a public use airport located two nautical miles (3.7 km) west of the central business district of Oxford, a city in Butler County, Ohio, United States. The airport is owned by Miami University but is operated by Cincinnati/Northern Kentucky International Airport. The airport has a particular focus on national security. It hosts events such as law and drug enforcement flights as well as military practices.