NO, Saint Lucia (French-English speaking volcanic island in the Lesser Antilles) is outside the EU — telecom roaming is billed at high rates with your usual carrier. The Alosea Saint Lucia eSIM is essential for honeymoon trips (UNESCO Pitons — two iconic volcanic peaks, turquoise waters, one of the world's most romantic honeymoon destinations) or paradise vacations. You connect to Digicel Saint Lucia or Flow upon landing at Hewanorra UVF (south) or George Charles SLU (north).