There are daily ferry and boat connections with Dubrovnik, while ferries also travel on the route Prapatno (Peljesac peninsula) to Sobra, significantly shortening the travel time to the island of Mljet.

 During the summer months, numerous tourist and excursion boats arrive to the area of the Mljet National Park (at the harbours of Polace and Pomena) from Dubrovnik, Korcula, Makarska and the Peljesac peninsula.
 The main port on the Island is Sobra, located on the island's eastern end which is connected by ferry to Dubrovnik and Korcula on Jadrolinija's coastal line. Also, there is a daily car ferry from Dubrovnik to Sobra. From Sobra, buses take you to Pomena and Polace.
 There is also a passenger boat, the Nona Ana, between Dubrovnik, Sobra and Polace that leaves in the morning and returns in the afternoon. It runs daily in summer and Wednesday, Friday and Sunday in the off season.