The purpose of this study is to identify international research trends in the social relationships of travel. Specifically, the study intends to define the scope and examine the change of trends in various characteristics of social relationships over time. A total of 83 papers published in 43 Social Science Citation Index (SSCI) journals were selected for analysis. Utilizing the content analysis method, these trends were examined from three perspectives in travel: 1) subject, 2) relational object, and 3) relational effects. Three dimensions of social relations theory; the personal dimension, the interpersonal dimension, and the relational effect dimension, were employed in the analysis. Based on previous research, each study was classified by year, subject, journal, research method, and analysis method. The results show that the number of studies began to increase in 2013, until reaching a peak in 2019. Moreover, in the personal dimension, the study found that the needs for relatedness both directly and indirectly affected travel motivation. In the interpersonal dimension, the results showed that behavioral exchange is preceded by emotional exchange. Lastly, in the relational effect dimension, social relationships in travel have an effect on increasing psychological benefits and on strengthening social utility. The study reveals that social relations in travel have expandability and circularity, while the objects of social relationship expand from existing relationships to new relationships such as residents and service employees. These findings suggest the importance of promoting the formation of multidimensional relationships among travel stakeholders.