The calculated distance (air line) between Sokołów Podlaski and Częstochowa is approximately 174 miles respectively 281 kilometers.
By car or train, the actual journey to Częstochowa is certainly longer, as only the direct route (as the crow flies) between Sokołów Podlaski and Częstochowa has been calculated here.
Air line (approximately)
281 kilometers
151 nautical miles