Athens (2 per day)
Thessaloniki - Kavala (7 per day)
Xanthi (13 per day)
Alexandroupolis (13 per day)

Since you arrive in Komotini you can travel to Fanari with the local bus operators. In summer months there is a Komotini to Fanari bus every 1-2 hours, but only during the day. The trip last about 25-30 minutes.

For more information and Timetables you can contact KTEL Rodhopis (Rodhopi Bus Operators Company):

Athens - +30 210 5152224
Thessaloniki - +30 2310 595419 
Komotini - +30 25310 22912