Ljubljana Joze Pucnik Airport ( Slovene : Letalisce Jozeta Pucnika Ljubljana ) ( IATA : LJU , ICAO : LJLJ ), also known by its previous name Brnik Airport ( Slovene : Letalisce Brnik ), is the international airport serving Ljubljana and the largest airport in Slovenia . It is located near Brnik , 24 km (15 mi) northwest of Ljubljana and 9.5 km (5.9 mi) east of Kranj , at the foothills of Kamnik–Savinja Alps .

The airport was officially opened in December 1963. It replaced Polje Airport in the former Municipality of Polje near Ljubljana, which served as the city's airport from 1933 and was Slovenia's first civil airport.