Further development of the airport continues, and in January 1975, the Coast Flight Centre is established. Later in 1975, construction work begins on a runway refurbishment and extension project. The first building phase of the airport terminal and platform is also initiated. The following year, on 21 August 1976, the airport re-enters full operations after construction works at the airport are completed. These include an enhancement to the runway, which is extended to and widened to - as well as the construction of an apron. Work is also completed on the first phase of the airport terminal and platform. On 1 October 1978, Portorož Airport is formally re-opened and entered into the register of airports and the register for panoramic flights. In 1979, a 400 m² aircraft hangar is constructed and the first C-172 aircraft is purchased.