The calculated distance (air line) between Konstancin-Jeziorna and Sosnowiec is approximately 152 miles respectively 245 kilometers.
By car or train, the actual journey to Sosnowiec is certainly longer, as only the direct route (as the crow flies) between Konstancin-Jeziorna and Sosnowiec has been calculated here.
Air line (approximately)
245 kilometers
132 nautical miles