Budapest to Slovenia Transportation

Flights to Slovenia have been rather limited since the Adria went bankrupt. But apart from the train, Flixbus has direct coaches from Budapest to Slovenia in about 6 hours.

@Badger...I appreciate the info on Flixbus. I should have mentioned in my original question, that bus transportation is not an option due to severe motion sickness issues when traveling via that mode. Again, thank you for the suggestion.

In that case I'd personally go for the train, even if takes a bit longer than a car it will be more comfortable and probably a lot cheaper (€19 if booked in advance).

You could always look into ride sharing. That's when you ride with a private individual in his car that's looking for someone to share expenses. Sounds like it could be an adventure.

I get motion sickness too - but a bus may not be any better than riding in a private car. I'd much prefer a train, even if it's a long ride. (I have not taken this train, though.)

One option with the train if you just lament the long ride is to split it up. E.g. get off in Ptuj, about five hours in, and either spend a few hours or spend the night and head on to Ljubljana the next morning. Ptuj is the oldest town in Slovenia, not very big but very interesting and not touristy at all.

We used MyDaytrip.com from Budapest to Ljubljana last spring and were very impressed. Yes, it is costly, but to save hours of travel time we felt it was worth it.