Your driver will pick you up from your hotel at 8:45 a.m. and you will arrive at the caves by 9:30 a.m. The ticket counter opens at 9:30 am and at 10 am you will enter the caves with a local English-speaking guide. This tour will include a train ride inside the cave as well as a walk of a 1 hour. After your tour, your private driver will meet you at the same place and drive back to your Ljubljana Hotel.
To save the time its possible for you to buy the tickets online via this link for 10am entry :- https://tickets.postojnska-jama.eu/en/buy-step-1.html