Severe changes occurred in east-west migration from the V4 countries, its regional role both geopolitically and in regards of its homogeneity, during the period since their EU accession. The four countries have similarities and differences both in immigration from the Baltic countries and in emigration to western countries. The latter is rarely examined field, especially in a comparative way, even less examined as embedded into a regional concept; for this reason we deal with it in more detail. Both economic and demographic differences are determinant alone in each country, but recent conflicts – which called EU integration in question (especially along with BREXIT) – are also important for preserving the regional integr...