To 15 ports; the busiest crossings are to Rhodes (1 hour 10 minutes, nine times a week in season), Tilos (35 minutes, five times a week in season), Nisyros (1 hour 20 minutes, five times a week in season), Kos (2 hours 10 minutes, five times a week in season), Diafani (1 hour 35 minutes, twice a week), Karpathos (2½ hours, twice a week), Kasos (4 hours 45 minutes, twice a week) and Sitia (7 hours, twice a week).