Nearly 20 years after the SARS (Severe Acute Respiratory Syndrome) epidemic, we are facing another COVID-19 pandemic. Therefore, the aim of our study was to analyse the impact of the COVID-19 pandemic on the tourism behaviour of international students in Poland. We paid attention to the overall impact of the pandemic on life, travel, choice of tourist destination, tourism activity, ecotourism preference, and health and safety issues. We formulated two research questions: What areas of international student tourism behaviour were affected by the COVID-19 pandemic? What differences in travel behaviour occurred between international students from Europe and Asia? Participants were recruited from universities located in Warsaw between June and September 2020. A total of 806 questionnaires were collected, 87 of which were eliminated due to non-response. The research sample consisted of 719 people. Six factors were identified in the survey results: tourism inclination, impact on tourist destination, hygiene and accommodation, impact on life, impact on tourism, and mode of tourism. Impact on life and impact on tourism were attributed to the general impact dimension; tourism inclination and mode of tourism can be summarized as attitude and preference. Food and accommodation were assigned to hygiene and safety dimensions. In almost all aspects, the impact of the COVID-19 pandemic on people’s lives was greater for Asian respondents. Asian respondents were more likely to say that they would avoid COVID-19-affected areas when choosing tourist destinations in the future, and avoid travelling to crowded large cities after COVID-19 ended. European survey participants’ responses were more moderate.