To 16 ports; the busiest crossings are to Prinos (Thassos) (1 hour 15 minutes, twice a day), Limnos (3 hours 15 minutes, nine times a week in season), Agios Efstratios (6½ hours, four times a week in season), Lavrio (14½ hours, four times a week in season), Mytilene (8 hours, five times a week, July to August and mid-September to May), Chios (11 hours, three times a week, July to August and mid-September to May), Samos (14 hours, three times a week, July to August and mid-September to May) and Karlovassi (15½ hours, twice a week, July to August and mid-September to May).