A new design solution – the front deflector – intended to improve the performance of the outer air seals of the low-pressure turbine is analyzed in this paper using steady Reynolds-Averaged Navier-Stokes (RANS) simulations of a three-stage, state-of-the-art LPT model, including inner and outer cavities. The regions near the casing in the LPT still show potential for improvement, mainly due to flow interactions associated with the outer air seals. One recent concept for improving these areas is the front deflector. The solution is to modify the front part of the cavity. Its operating principle is to introduce an additional labyrinth for the leakage while simultaneously minimizing the front cavity volume. In the paper, several scenarios for implementing this feature are analyzed, including reducing the front-cavity volume without a static fin and adding a static fin to create an auxiliary labyrinth. Furthermore, the effects on the flow and the potential improvements in LPT efficiency associated with the solution are discussed. The former reduces front-cavity recirculation and its interaction with the mainstream; the latter reduces seal leakage when the fin length is sufficient. Across three stages, the predicted changes in LPT isentropic efficiency are on the order of 0.03–0.06%, depending on the scenario.