Ljubljana is easily accessible by train, by car and by air, with Ljubljana Jože Pučnik international airport being only a short drive away. The Conference venue in Grand Hotel Union is located in city center next to the city’s central Prešeren Square.
There are also other options to reach Ljubljana by air. For example Zagreb airport is a reasonable distance away. It is advisable to book a transportation to/from the airports in advance. Check links below
https://www.goopti.com/en/
https://shuttle.nomago.si/en/routes