Between September 6 and October 25, 1944, the airport was used as the main base of the Slovak Insurgent Air Force but because of the advancing German units, it had to be evacuated.

While the territory controlled by the Slovak rebels was being encircled by the German forces, "Tri Duby" and the nearby Zolná airport were the main gateways to the rest of the world.

In addition to the significant Soviet aid to Slovakia, the United States were sending in supplies and OSS operatives through "Tri Duby", and these flights were also used to evacuate American flyers liberated from the German POW camps.

[3][4] Sliač Airport operated only summer charter flights to popular sea resort destinations in Bulgaria, Turkey, Greece and Egypt.

According to ADS-B tracking data, beginning on April 26, 2022 the airport received multiple visits by three LM-100J aircraft (N67AU, N96MG, N71KM) belonging to the American company Pallas Aviation.