Ferry to Turku and Aland Islands
One of your option to travel by ferry from Finland to the Aland Islands and vice versa is the ferry from Turku to Mariehamn. The ferry from Turku sails to Mariehamn on the Aland Islands from where it sails further to Stockholm. If you choose to sail by ferry on this route from Finland to the Aland Islands or vice versa you can choose for either a day or a night crossing with Viking Line or Tallink Silja ferries.
This crossing takes you from the Aland Islands to Turku in about 5 hours and 15 mins