Kefalonia is the biggest of the Ionian Islands. Argostoli is the capital of the island. There are 2 main ports that connect the island with other Greek cities. There is a port in Sami, from where boats leave to Ithaca, Patra and Italy. Poros is the other main port, in the south-eastern side of Kefalonia, from where boats daily depart to Killini.
In case you need more information about ferry departures and arrivals from and to the ports of Kefalonia you can call at: Port authority in Argostoli (+30 26710) 22224, Port authority in Sami (+30 26740) 22031 and Port authority in Poros (+30 26740) 72460.