The calculated distance (air line) between Bielefeld and Preußisch Oldendorf is approximately 19 miles respectively 30 kilometers.
By car or train, the actual journey to Preußisch Oldendorf is certainly longer, as only the direct route (as the crow flies) between Bielefeld and Preußisch Oldendorf has been calculated here.
Air line (approximately)
30 kilometers
16 nautical miles