Leros (Greek: Λέρος; Italian: Lèro) is a Greek island in the Dodecanese, in the southern Aegean Sea. It lies 317 km (171 nautical miles) from Athens's port of Piraeus, from which it can be reached by an 11-hour ferry ride (or by a 45-minute flight from Athens). The island is 53 square kilometres (20 sq mi) and has a coastline of 71 km (44 mi).