The Orthodox churches in Western Europe face unique ecumenical challenges shaped by theological, cultural, and social factors. Theologically, unresolved issues such as papal primacy, the filioque clause, and differing views on Scripture and sacraments hinder deeper communion with Catholic and Protestant traditions. The decentralized, autocephalous structure of Orthodoxy adds complexity, as does its liturgical distinctiveness, including ancient languages, traditional practices, and differing calendars. Migration has expanded Orthodoxy's presence but also led to jurisdictional fragmentation, with multiple independent jurisdictions often prioritizing identity preservation over unity. Despite these challenges, shared commitments—such as sacramental worldviews with Catholics and social justice initiatives with Protestants—offer opportunities for engagement. However, the secularized context of Western Europe necessitates balancing tradition with a united Christian witness. Visible divisions among Christians undermine the faith's credibility, pressing Orthodox churches to foster collaboration. Platforms like the World Council of Churches provide opportunities for dialogue, though tensions persist. Ultimately, Orthodox churches must navigate the tension between preserving their heritage and engaging meaningfully with other Christian traditions. Addressing jurisdictional fragmentation, promoting mutual understanding, and adapting to a pluralistic society are crucial for advancing ecumenical unity and strengthening their witness in the region.