The calculated distance (air line) between Czechowice-Dziedzice and Gliwice is approximately 30 miles respectively 49 kilometers.
By car or train, the actual journey to Gliwice is certainly longer, as only the direct route (as the crow flies) between Czechowice-Dziedzice and Gliwice has been calculated here.
Air line (approximately)
49 kilometers
26 nautical miles