Resumo: This research project aims to identify the relationship between the principal dimensions that contribute to ensuring the quality of online service (shopping, design, security, information and communication experience) and the satisfaction of the users of travel websites. The methodology used consists of in-depth interviews and a review of the literature to identify the dimensions that can be identified as comprising the quality of service and satisfaction. After proposing the conceptual model, the survey technique is used to measure each of the items. For the results, the factorial analysis is used for the exploratory phase and the structural equations for the confirmatory phase. In conclusion, we can affirm that there is a positive relationship between the dimensions that comprise the quality of service in travel websites and the satisfaction of users. Specifically, the dimensions of communication and information have a determining role in the satisfaction of the services of travel websites.