Piraeus Port is the Main port of Athens Greece with a year-round service to international destinations as well as islands of the Argosaronic (Hydra, Spetses, Poros, Aigina and Salamina), the Aegean Sea ( Cyclades, the Dodecanese) and of Crete. It does not serve the islands of the Sporades.
The Agios Konstantinos Port is the only Athens port that has scheduled departures to the islands of the Sporades (Skopelos, Skiathos, Skyros and Alonissos).
The Lavrio Port offers year-round service to Kea, Kithnos, Syros, Tinos, Andros, Ios, Sikinos, Folegandros, Milos, Paros, Naxos, Limnos, Agio Efstratios and Kavala.

The Rafina Port offers year-round service to Andros, Tinos, Mykonos, Marmari and Evia. In the summer there is an additional service to Syros, Naxos.