Sliač Air Base (IATA: SLD, ICAO: LZSL), historically, Letisko Sliač ("Sliač Airport") or Letisko Tri Duby (literally, "The Three Oaks Airport") is a military 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). The airport is used only by the military since October 2021, when the airport has been closed to all civilian traffic. In 2022, the airport operator company Letisko Sliač a.s. went into liquidation and all airport equipment was sold.