Direct buses from Dubrovnik to Ljubljana in Slovenia are not available, but if you take a bus from Dubrovnik to Zagreb (schedule here) and then change to a bus to Ljubljana there, you are travelling the same way as a direct bus would have done. You can see bus departure from Zagreb to Ljubljana here. Total travel time for the trip should be around 12-14 hours. By car: It is possible to do the trip by car in about 8-9 hours, keep in mind you have costs for both the Croatian (Tool fees) and the Slovenian (Vignette) highway, you can check out price for a rented car here. By train: Not possible from Dubrovnik  By plane: During summer season their might by planes available View Larger Map