This study investigates the aerodynamic performance of a hyperloop pod operating in a partially evacuated tube under varying conditions of blockage ratio (BR), Mach number (Ma), and gas composition (air and helium). Computational analysis is performed using steady-state Reynolds-Averaged Navier–Stokes (RANS) equations with the k–ω SST turbulence model. A total of 12 cases are analyzed, covering BR values of 0.1, 0.5, and 0.9 at Mach numbers 0.2 and 0.4 for both gases. Key aerodynamic parameters like drag force, drag coefficient (Cd), and pressure coefficient (Cp) are evaluated to understand flow behavior in confined environments. Results show that drag increases exponentially with BR for both gases, with helium consistently producing lower drag due to its lower density and higher compressibility. Cp distributions reveal higher pressure buildup for air, especially near the pod nose, indicating stronger adverse pressure gradients and increased drag. Comparison underscores advantages of helium in reducing aerodynamic resistance and delaying choking effects. The findings emphasize the need to optimize BR, gas selection, and operating speed to ensure efficient performance and avoid exceeding the Kantrowitz limit. Future work should explore unsteady effects, pod designs with axial compressors, and thermal influences to further enhance hyperloop system design. This research provides a foundational understanding for developing energy-efficient and aerodynamically stable hyperloop transportation systems.