By sea

The country boasts a particularly extensive coastal transportation network serving all Greek islands , the majority of coastal destinations in mainland Greece and certain international ports.

The Greek fleet, consisting of all types of vessels (passengers ships, ferry boats, hydrofoils, etc) operating on domestic and international routes, has undergone major refurbishment, thus ensuring travellers speedy, reliable and enjoyable travel.

Aegean and Argosarosikos islands and Crete are linked mainly with Piraeus and Rafinas port.
Ionian Islands are linked with Patras, Killinis, Igoumenitsas and Astakos port.

More info about Piraeus port,  Patras port and Igoumenitsa port.