Piraeus is the largest port in Greece and Europe in terms of passenger traffic, with 20 million visitors annually. From the port of Piraeus, daily ferry routes depart to the Argosaronic Gulf, the Cyclades, Crete, the Dodecanese and the islands of the North Aegean.

Due to its large size, the port has 12 gates from which ships depart. More specifically, the gates are as follows: