Adria will start flying the six planes in September. The Saabs will fly Adria's scheduled routes and the company does not exclude the possibility of leasing them to other companies under the Aircraft, Crew, Maintenance and Insurance (ACMI) system.
Adria CEO Holger Kowarsch said this was an "important milestone in the history of Adria Airways", which confirmed the efforts of its new owners for development of the company.
"Our priority is to keep our passengers happy and by acquiring these six extra planes we will have no problem delivering on that promise," said commercial director Christian Schneider.
The Saab planes join the existing Adria fleet that consists of 15 aircraft: three Airbuses 319, two Bombardiers CRJ700 and three Bombardiers CRJ70.
In total, Adria will now manage 21 planes, which the company says is the biggest fleet in the history of the company.
The air carrier expanded its list of destination with seven new cities - Sofia, Bucharest, Geneva, Hamburg, Düsseldorf, and Croatia's Dubrovnik and the island of Brač.
The number of weekly flights was also increased along with the number of staff in the operative sector.
Adria Airways operates more than 200 direct flights to 25 destinations from the Ljubljana Airport every week and 17 direct flights a week from Prishtina and Tirana.