Diplomatic relations between the two countries were interrupted during World War II and officially restored on 29 August 1991.

[3] Both Finland and Estonia are members of the European Union, Schengen agreement and the Eurozone, freeing international travel and trade between the countries.

In response to the Soviet invasion, diplomatic missions were de facto removed.

During the restoration of Estonia's independence, Finland secretly contributed with significant economic aid and know-how under the cover of "cultural co-operation" in order to not upset the Soviet Union.

In 1917, 1918 and 1940, the Estonian president Konstantin Päts wished for a union of Finnic countries in his political testament, writing an outline of a unification plan.

He used the term "soomesugu" in Estonian to point to the people and countries of Finland and Estonia when talking about common border law.