Research on international retirement migration has so far focused on quantitative measures of migration, migrants' wellbeing, reasons for migration and consequences of migration in the receiving areas, while paying scant attention to the transnational experiences of the migrants. Research on transnational forms of living, on the other hand, has largely ignored the life projects of retirees. This paper tries to bridge that gap, by investigating experiences of transnational mobility, multiple place attachment and cultural differences among Swedish retirees pursuing seasonal migration between Sweden and Spain. Qualitative interviews were made with 46 respondents who spent at least three months per year in each country. The analysis of the interviews produced three ideal-typical transnational lifestyles: translocal normality, multilocal adaptation and routinised sojourning. These lifestyles reflect different strategies for managing cultural difference, but also different forms and aspects of place attachment and different ideals of mobility.