Boulder Municipal Airport (IATA: WBU, ICAO: KBDU, FAA LID: BDU) is a public airport located three miles (5 km) northeast of the central business district of Boulder, a city in Boulder County, Colorado, United States. It is owned by the City of Boulder. Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, Boulder Municipal is assigned BDU (formerly 1V5) by the FAA and WBU by the IATA (which assigned BDU to Bardufoss Airport in Bardufoss, Norway). The airport's ICAO identifier is KBDU.