The easiest way to travel between Greece and Turkey is on a ferry from a Greek island to the Turkish mainland(or vice-versa).
Ferries (motorboats and hydrofoils) depart from at least six Greek islands to ten ports in Turkey. The busiest, most convenient Turkish ports are Bodrum, Marmaris,Kuşadası and Çeşme; those in Greece are Rhodes, Kos, Samos and Chios