The decarbonization of electric power systems, accompanied by the electrification of transportation, presents significant challenges in operating the power system, but at the same time, it can offer opportunities to provide flexibility to the system. This paper studies the potential of electric vehicle to enhance the flexibility of the Chilean power system. An operation model of electric vehicles considering intelligent charging and discharging modes is presented. The model is integrated to unit commitment model, with the objective of analyzing the impact of flexible EV operation modes on the system operation. The results show that a flexible operation of electric vehicles allows reducing operating costs, renewable curtailment, load shedding, and the system peak demand.