TT-line operates daily ferry trips between Travemünde and Trelleborg, Sweden. During the summer time and on public holidays the ferries are very well booked. Make sure you have a reservation. Finnlines operates ferries to Helsinki, Finland around the year. The trip's duration is a little more than a day. Several ferries and cargo ships travel to ports in the Baltic Sea and especially in the summer they are willing to take travellers on board.