Lines feature fast ferry service to Tallinn September 28, 2000 Share 1 -- TALLINN, Estonia -- Tallinn is a coastal city easily reached by ship from Helsinki, Finland. The Finnish capital is only 50 miles away from Tallinn, and several lines run ferries between the two cities.Two lines, Tal-link and Silja, have vessels that make the crossing in 90 minutes, and these ships run at least three times a day each way in the summer. The service runs less frequently in the winter.Tallink, based here, operates a catamaran, and Finland-based Silja's new ship, introduced this year, is the SuperSeaCat Four, a yacht-like vessel with the speed of a catamaran.It is recommended to purchase a ticket ahead of time, particularly on morning trips from Helsinki to Tallinn, when vessels are more likely to be crowded.The Tallinn ferry terminal is about a 15-minute walk northeast of the Old City, which is the city's chief tourist attraction.For more information, visit Tallink on the Web at www.tallink.ee/eng, or check out Silja's Web site, at www.silja.com/english.U.S. agents can book Silja ferries by calling Norwegian Coastal Voyage, which handles Silja's American bookings, in New York at (800) 323-7436.A roundtrip ticket on an express service with either line should cost around $25. The price will depend on the season and the strength of the dollar.A handful of companies, including the two detailed above, offer ferry services from Tallinn.