Seyðisfjörður is a city in East Iceland.
There is a weekly ferry run by Smyril line, tel +354 472 1111 - to Denmark and the Faroe Islands. The schedule is horrendously complicated but it generally departs once per week at 8AM during the summer half the year (April-June and August-October) , and at 1PM during high season (June-August). Check website for details. Due to the limited market, and rough conditions, prices are very high. A return journey to Denmark for instance will set you back €280-590 with a car or €120-250 per passenger, depending on the season, excluding a supplement fare for a cabin or bed.