The calculated distance (air line) between Miasteczko Śląskie and Gliwice is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Gliwice is certainly longer, as only the direct route (as the crow flies) between Miasteczko Śląskie and Gliwice has been calculated here.
Air line (approximately)
29 kilometers
16 nautical miles