The calculated distance (air line) between Oborniki Śląskie and Częstochowa is approximately 102 miles respectively 164 kilometers.
By car or train, the actual journey to Częstochowa is certainly longer, as only the direct route (as the crow flies) between Oborniki Śląskie and Częstochowa has been calculated here.
Air line (approximately)
164 kilometers
89 nautical miles