Duty-free shop is an important market place where tourists’ economic benefit is actualized. One among the most significant changes in dury-free shop business is the emergence of online duty-free shop. The purpose of this study is to investigate the factors affecting young Chinese customers’ intention to use online and offline duty-free shops. For empirical study, an online survey was conducted on Chinese students who live in Busan in 2017. For data analysis, decision tree analysis was used to identify influencing factors among individual characteristics, shopping orientation, and attributes of online/offline duty-free shops. Results indicate that average spendings in online and offline duty-free shop, price importance of offline duty-free shop, gender and age are significant identifiers for the choice to use either online or offline duty-free shops. Results indicate that targeting under 24 for high-end products could be an effective approach for offline duty-free shops. Other managerial implications of the results for the duty-free shops are presented.