In recent years, area of software product development not only focused on features but also usability aspect. Software product must deliver the best user interface since it launched. To achieve this aim, the developers should realize application with suitable features and good interface based on user needs. This paper aim is to present user interface design for online travel booking application. This research is consisted of five phases, i.e. defining research problem, collecting literatures, designing research methodology, evaluating existing system, proposing of an initial model of user interface. As the research result, we proposed user interface of initial design that is consisted of main menu, content sliders, online booking form, body and footer. Main menu is designed by providing menu flight, hotel, train, travel add-ons, promo, register, login, and contact. Content sliders contained image about promo and favorite destination. The online booking is provided for many types based on order such as flight service, hotel service, trains service and so forth. The body of web contained information about favorite destination, promo and best offers. For footer presented social media, about, support and many more.