This book explores how the real conditions and subjective conceptions of ageing and well-being are transformed when people move from one country to another. Focusing on ageing female migrants from Latvia in the UK and other European countries, this book is based on fifty life-history interviews with women aged 40s-60s. Empirical chapters concentrate on functional well-being in migration, which includes access to the economic citizenship of work, income, pensions, and accommodation, and on psychosocial well-being, and explores Latvian women's experiences of intimate citizenship in migration. In addition, the authors' research challenges the trope of vulnerability which generally surrounds the framing of older migrants' lives. The study's findings offer policy-makers insights into the realities of ageing working migrants and advocates for a more inclusive transnational citizenship, better working conditions, and ongoing care arrangements for older migrants post-retirement, either abroad or back home.