Colorado Springs Airport (IATA: COS, ICAO: KCOS), also known as City of Colorado Springs Municipal Airport or Colorado Springs Peterson Field Airport, is a public airport located six miles (10 km) southeast of the central business district (CBD) of Colorado Springs, a city in El Paso County, Colorado, USA. It is the second busiest airport in the state of Colorado. The airport is co-located with Peterson Air Force Base, which is located along the north side of runway 12/30.