The calculated distance (air line) between Bielefeld and Rheda-Wiedenbrück is approximately 16 miles respectively 26 kilometers.
By car or train, the actual journey to Rheda-Wiedenbrück is certainly longer, as only the direct route (as the crow flies) between Bielefeld and Rheda-Wiedenbrück has been calculated here.
Air line (approximately)
26 kilometers
14 nautical miles