This paper evaluates the benefits derived from demand flexibility from the DSO perspective. It presents various simulations in the network of Evora, considering different scenarios for load, generation and the network capacity. Moreover, for each scenario business cases are developed for the provision of the customer flexibility as a service to the DSO. The results of the business cases indicated that demand flexibility has a potential to improve the operational conditions of the network, reducing losses and increasing renewable energy sources (RES) hosting capacity. These benefits are more relevant for networks operating close to the operational limits, since this flexibility can contribute to deferring upgrade investments.