International student mobility (ISM) has emerged as an important field of study that various nations and organizations have been attaching great importance to. This paper studies the drivers of international student mobility, using a competing destinations model for the international student flows among 35 OECD countries in the period 2004-2018, by integrating the motivations for ISM. We find that OECD students are motivated by both career orientation and personal and cultural experience when decide to move abroad for study. Nonetheless, remarkable differences emerge when considering country subgroups (origin countries, wealthier, English-speaking top destination (namely US, the UK, Canada, and Australia), and European countries, students search for personal and cultural experience, valuing the lifestyle of the destination country. Students seeking for education quality are instead polarised in the rest of the OECD countries.