To 21 ports; the busiest crossings are to Suomenlinna (20 minutes, about 28 times a day, May to September), Lonna (10 minutes, 25 times a day, May to September), Tallinn (2 hours, 12 times a day), Vallisaari (20 minutes, nine times a day, late May to mid-September), Kalasatama (15 minutes, about six times a day, early June to early September), Herttoniemi (35 minutes, four times a day, June to August), Laajasalo (an hour, four times a day, June to August) and Vartiosaari (1 hour 5 minutes, four times a day, June to August).