This study aimed to assess the relevance and effects of online international programs implemented by C National University of Education in the era of the Covid-19 pandemic and to explore ways to sustain and improve international programs through online methods in the future. To this end, we conducted an online survey of the 33 program participants, and the survey included questions regarding the relevance of program content and organization to the needs of the participants; the level of participant satisfaction and participation; the effects of the programs; program limitations and elements requiring improvement. Looking into the survey results, we found that overall, the participants considered the content and organization of the programs to be relevant to their needs; the majority of the participants responded positively to the questions of whether the programs were appropriate in terms of duration, schedule, content, and assignments. The participants also appeared to be actively engaged in online classes and activities and to be satisfied with the overall quality of the programs. As for the effects of the programs, more than half of the participants perceived the programs to be effective in developing their English communication skills. They also reported positive gains in their understanding of the culture and education of the host country. Their experiences with online learning were also promising in that they had little difficulty understanding the content of online classes and participating in discussions, and online platforms such as a learning management system and an online archive were effectively used along with the classes. Nevertheless, the participants pointed out some limitations of the programs such as the optimal class size for an online program and some technical issues with observing local classrooms online. Drawing implications from the findings, we then suggested future directions to improve online overseas programs.