The airline has already based a CRJ900 aircraft at Pristina Airport in Kosovo, and is now looking to set up similar operations at Tirana in Albania, Verona in Italy, and Klagenfurt in Austria.
All of these airports are within close proximity of Slovenia.
The newly-announced Verona hub will allow Adria to take up routes dropped recently by Air Dolomiti, and it intends to connect the city to its fellow Star Alliance partner hubs at Brussels, Vienna and Zurich. Flights will start in 2014.
Klagenfurt is still being evaluated as a possible base for 2014.