Travel office of Koufonissia: Katerina Prasinou
Telephone: +30 2285071438

From Piraeus: Blue Star Ferries : Blue Star Naxos η Blue Star Paros
From Piraeus: Hellenic Seaways : Highspeed 4
From Piraeus: Seajets
From Naxos: Zas Travel : Express Scopelitis
From Syros: NEL : Aqua Spirit

There is also connection with Syros, Paros, Amorgos, Milos, Folegandros, Santorini and of course the near by small cyclades Iraklia, Sxinousa, Donousa.