On 28 January 1971, the city of Piran decides to build an international sports airport at Portorož Airport. In July of the same year, the airport location is approved and the subsequent construction permits are issued for the construction and reconfiguration of the runway: 700 m long and 20 m wide (2,297 ft. long and 66 ft. wide). On 24 January 1972, the airfield construction and reconfiguration works are completed. The following year, 12 February 1973, the ZUCZP grants permission to register and license Portorož Airport for aviation sports purposes.