The calculated distance (air line) between Strzelce Opolskie and Częstochowa is approximately 41 miles respectively 66 kilometers.
By car or train, the actual journey to Częstochowa is certainly longer, as only the direct route (as the crow flies) between Strzelce Opolskie and Częstochowa has been calculated here.
Air line (approximately)
66 kilometers
36 nautical miles