From St. Petersburg to Helsinki you can swim by the ferry "Princess Maria". Transportation is carried out by the company "St. Peter Line ", in Helsinki ferries arrive in the southern harbor (terminal Makasiini). The cost of accommodation in a four-person cabin starts from EUR 25 for early booking and from EUR 38 for usual. The Princess Maria ferry offers 606 cabins of different classes and price categories, and its car deck can accommodate up to 395 cars.