Banja Luka is the university, economic, financial, political, and administrative center and the second largest city of Republika Srpska, one of the two political entities in Bosnia and Herzegovina.
Since the city was famous for its parks, trees, and greenery, it was often referred to as the "Green City". It's also known as the "city of youth, sports, and culture".
Belgrade - Banja Luka flights
Book your tickets to Banja Luka online and arrive in the Green City in less than an hour.