Upvote:2
It seems that there are no direct buses to Perperikon.
I could find only a daily busline from Haskovo (Хасково) to Kardzali (Кърджали) via Stremtsi (Стремци), but the Problem is that Stremtsi is 8km from Perperikon (1-2 hours walking)
Onother way to visit Perperikon is to take a taxi from Kardzali. At the moment the taxi rate is about 0.60 BGN/km (about 0.30 EUR), the distance is about 20km, so it would cost about 7 EUR or even less if you try to deal with the taxi driver.