This study aims to examine and analyze the effect of perceived usefulness and security on consumer trust towards repurchases intention in online travel agent industry. Research data is primary data derived from online questionnaires sent to consumers which at least had done transaction in Tiket.com Online travel agent. Sampling numbers in this research are 132 respondents and the analysis method used is SEM (Structural Equation Modelling) with AMOS 24 Software. The result reveals trust is able to mediate perceived usefulness and security with repurchase intention in online travel agent industry. Implications and limitations are discussed.