Flag Of The Closest Country That Doesn’t Share A Land Border With The Country

The map shows the flag of the country that is closest to each country that it does not share a land border with. Here is an explanation for each one:

Northern Europe & British Isles

Iceland → Denmark: no land borders at all; Greenland (Danish) is ~290 km away.
United Kingdom → France: only land border is Ireland; France is 33 km across the Dover Strait.
Ireland → France: only borders the UK; Brittany is next closest (~420 km).
Norway → Denmark: borders Sweden, Finland and Russia; Denmark is ~110 km across the Skagerrak.
Sweden → Denmark: borders Norway and Finland; Denmark is 4 km across the Øresund.
Denmark → Sweden: only borders Germany; the same 4 km strait in reverse.
Finland → Estonia: ~50 km across the Gulf of Finland.
Estonia → Finland: the same gulf in reverse.
Latvia → Sweden: Gotland is ~150 km off the Latvian coast.
Lithuania → Estonia: Estonia’s Ruhnu island in the Gulf of Riga is ~150 km away, just beating Gotland.
Belarus → Estonia: ~160 km across Latvia’s narrow eastern end.
Russia → Japan: the Kuril Islands and Sakhalin are only ~20–40 km from Hokkaido.
Kazakhstan → Mongolia: a ~40 km Russian–Chinese sliver separates them.

France → Canada: Saint-Pierre & Miquelon are ~20 km off Newfoundland – overseas territory counts.
Belgium → United Kingdom: ~85 km across the Channel, nearer than any non-bordering continental country.
Netherlands → Luxembourg: ~63 km from Vaals to Luxembourg’s northern tip, narrowly beating France (~66 km).
Luxembourg → Netherlands: the same gap in reverse.
Germany → Liechtenstein: only ~33 km from the German border, with Austria and Switzerland in between.
Switzerland → Slovenia: ~220 km across the Alps, narrowly ahead of Luxembourg and Monaco.
Austria → Croatia: Slovenia is only ~26 km wide at its eastern end.
Czechia → Hungary: ~70 km across the Slovak/Austrian corner near Bratislava.
Poland → Hungary: ~90 km across eastern Slovakia, just beating Denmark’s Bornholm (~95 km).
Slovakia → Romania: ~85 km across Ukraine’s Zakarpattia strip.
Hungary → Bosnia and Herzegovina: ~65 km across Croatia’s Slavonian neck, closer than Czechia (~80 km).
Italy → Croatia: the Croatian islet of Palagruža is ~45 km from Italy’s Pianosa.

Spain → Algeria: Spain touches Morocco via Ceuta and Melilla, so Algeria (~180 km from Cabo de Gata) is next.
Portugal → Morocco: ~240 km from the Algarve (Gibraltar is closer but is a UK territory, not a country).
Morocco → Portugal: the same in reverse.
Algeria → Spain: ~180 km across the Mediterranean.
Tunisia → Italy: Pantelleria is ~70 km off Cap Bon.
Libya → Greece: Gavdos, south of Crete, is ~280 km away.
Egypt → Jordan: ~10 km across the head of the Gulf of Aqaba, past Eilat.

Slovenia → Bosnia and Herzegovina: ~45 km across Croatia near Karlovac.
Croatia → Austria: ~26 km across Slovenia’s Prekmurje.
Bosnia and Herzegovina → Slovenia: the same 45 km in reverse.
Serbia → Albania: ~22 km across the Montenegro/Kosovo tripoint area.
Albania → Serbia: the same in reverse.
Montenegro → North Macedonia: ~40 km across the Kosovo/Albania corner.
North Macedonia → Montenegro: the same in reverse.
Kosovo → Bulgaria: ~45 km across southern Serbia.
Bulgaria → Kosovo: the same in reverse.
Romania → Slovakia: ~85 km across Ukraine’s Zakarpattia.
Greece → Italy: ~75 km from Corfu’s outer islets to Apulia.
Moldova → Bulgaria: ~150 km across Romanian Dobruja.
Ukraine → Bulgaria: ~160 km across Dobruja, nearer than Turkey across the Black Sea.