This article takes a comprehensive approach to summarize the four digital eras in the travel and tourism space since 1960s. The four eras discussed can be characterized as GDS (global distribution systems), Internet, SoLoMo, and Hybrid periods. Key components of each era are discussed in this paper with respect to the hospitality industry’s distribution intermediaries. The article concludes by listing some of the important upcoming trends in the online distribution channels for the hospitality industry.