Sliač Airport (IATA: SLD, ICAO: LZSL) or, historically, Letisko Tri Duby (literally, "The Three Oaks Airport") is an international airport in central Slovakia situated between the towns of Zvolen and Banská Bystrica and near the spa town of Sliač. The airport has one runway which is 2,400 m long (18/ 36).