ECAC brings together the widest grouping of Member States of any European organisation dealing with civil aviation, being currently composed of 44 Member States (shown on the interactive map below): Albania, Armenia, Austria, Azerbaijan, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Georgia, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Republic of Moldova, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye, Ukraine and United Kingdom.
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| Albania | Armenia | Austria | Azerbaijan |
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| Belgium | Bosnia and Herzegovina | Bulgaria | Croatia |
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| Cyprus | Czechia | Denmark | Estonia |
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| Finland | France | Georgia | Germany |
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| Greece | Hungary | Iceland | Ireland |
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| Italy | Latvia | Lithuania | Luxembourg |
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| Malta | Monaco | Montenegro | Netherlands |
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| North Macedonia | Norway | Poland | Portugal |
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| Republic of Moldova | Romania | San Marino | Serbia |
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| Slovakia | Slovenia | Spain | Sweden |
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| Switzerland | Türkiye | Ukraine | United Kingdom |
