Windsor Castle is approximately 22 to 25 miles (about 35 to 40 kilometers) west of London, depending on the specific route. By car, the journey usually takes around 45 minutes to an hour in clear traffic, though it can take longer during peak times. By train, it takes about 30 to 60 minutes, depending on the route and whether there is a direct service or a transfer in Slough. Windsor & Eton Riverside Station is close to the castle, just a 5-minute walk away from the entrance.