ABSTRACT Today, the importance of sustainable tourism has become a global issue. Sport tourism is a relatively recent area of focus, and football tourism is probably the most popular in leisure sport travel. Sustainable mobility is vital to reducing the environmental impact of sport tourism. Since attending football matches has a significant impact in terms of travel, this study investigated football spectators’ behaviours in relation to sustainable mobility. By administering approximately 1,500 questionnaires to French football supporters, this study explored what affects supporters’ decisions regarding mobility options. Based on the theory of planned behaviour, this study investigated the individual behaviour resulting from intentions, which in turn is influenced by attitudes, subjective norms, and perceived behavioural control. This study also considered the role played by other internal factors, such as environmental concerns. Using structural equation modelling, the results highlight that supporters’ attitudes and opinions, and their perceived control of the behaviour and society’s subjective norms influence their behavioural intention in relation to adopting sustainable mobility actions. This study recognizes the strong willingness to adopt green behaviours among football supporters, which football organizations and tourism actors should support.