The fjord lies between the Dýrafjörður and the Súgandafjörður in the north. It is up to seven km wide and 20 km far into the country. In 1980 the inner part of the fjord was almost separated by dams and an 80 m long, single-lane bridge. In leading Vestfjarðavegur . The inner fjord is accessed from Önundarfjarðarvegur . This is 9 km long and also leads to one of the few youth hostels in the Westfjords. On the north bank of Önundarfjörður is the place Flateyri , which gained notoriety in 1995 when an avalanche killed 20 residents.
- Brúaskrá - Brýr á þjóðvegum (February 2016). Retrieved August 11, 2018 (Icelandic).