The Internet has made searching for hotel room information and making online reservations common practices among hotel guests. Despite constantly changing consumer behavior and widespread application of online hotel information sources, limited studies have been conducted to examine the online sources used frequently by customers and the related attributes of such sources. As such, drawing from an online questionnaire survey with 205 respondents, findings in this study indicate that there are no socio-demographic effects on future purchase intention of Generation (Gen) Y travelers. Moreover, websites of suppliers (e.g. official websites of hotels), travel intermediaries (e.g. Hotels.com), and social media (e.g. TripAdvisor) are the three major types of websites used by Gen Y hotel guests. Travel intermediary websites are often used to search for hotel information, whereas social media websites are used to make reservations. Based on these findings, implications for hotel managers are discussed.