Travel for leisure and tourism is a global phenomenon that continues to increase in economic and social terms. Tourism and the related ideas of mobilities are part 'of the same set of complex and inter-connected systems, each reproducing each other'. This chapter explores these systems in both tourist behaviour towards travel and the systems of tourism mobilities. It focuses on several perspectives including studies associated with the behavioural aspects of leisure, travel and tourism, through the lens of mobilities. The chapter discusses the evolution of tourism travel through the lens of the growth of popular travel and the innovation of the package holiday, and examines the notion of auto-mobility in a leisure-travel context. Technology and more especially the use of social media and the Internet have changed access to information and the holiday-planning process. The link between increased air travel and leisure consumption has been viewed as part of what Urry (2010) has termed 'high mobility systems' or 'mobility complex'.