The globalization of higher education, through the mobility of students, has grown considerably over the past 40 years. However, little research has been carried out on international student mobility determinants in general, on Erasmus student mobility in particular, or the regional dimension of learning mobility. This paper aims to shed light on degree and credit (identified as those students that moved abroad under the Erasmus exchange program) mobility at the tertiary level across and within countries (with differences across regions), as well as across education levels (from International Standard Classification of Education (ISCED) 6 to 8). It analyses the main factors associated with mobility at the EU level comparing institutional factors (teaching and research activities of universities) and regional attractiveness (level of urbanisation, employment opportunities, and education systems). To do so, the work mainly relies on information from the European Tertiary Education Register (ETER) between 2011 and 2017. This is complemented by secondary data at the regional level based on Eurostat information. It will present updated results of a previous study undertaken at the European Commission Joint Research Center. Reference: Barrioluengo, Mabel Sánchez, and Sara Flisi. “Student mobility in tertiary education: institutional factors and regional attractiveness.” No. JRC108895. Joint Research Centre (Seville site) (2017).