Distance from sioux falls sd to rapid city sd The driving distance between the two cities can also vary slightly depending on the starting and ending points within each city. For example, the distance may be slightly shorter if driving from the eastern part of Sioux Falls to the western part of Rapid City, as opposed to driving from the southern part of Sioux Falls to the northern part of Rapid City. It is important to note that the driving distance between Sioux Falls and Rapid City is not the same as the straight-line distance between the two cities. The straight-line distance is approximately 240 miles (386 kilometers), but this distance cannot be traveled by road and is therefore not relevant for driving purposes. In summary, the driving distance from Sioux Falls, SD to Rapid City, SD is approximately 330 miles (531 kilometers), and the journey typically takes about 5.5 hours. There are two main routes that can be taken, with the choice of route depending on factors such as the presence of interstate highways and the specific starting and ending points within each city. The distance from Sioux Falls, SD to Rapid City, SD is approximately 330 miles (531 kilometers) by road. This distance is typically covered by car in about 5.5 hours, depending on the specific route taken and traffic conditions.