The calculated distance (air line) between Konstancin-Jeziorna and Częstochowa is approximately 124 miles respectively 200 kilometers.
By car or train, the actual journey to Częstochowa is certainly longer, as only the direct route (as the crow flies) between Konstancin-Jeziorna and Częstochowa has been calculated here.
Air line (approximately)
200 kilometers
108 nautical miles