The calculated distance (air line) between Warsaw and Siemianowice Śląskie is approximately 157 miles respectively 253 kilometers.
By car or train, the actual journey to Siemianowice Śląskie is certainly longer, as only the direct route (as the crow flies) between Warsaw and Siemianowice Śląskie has been calculated here.
Air line (approximately)
253 kilometers
136 nautical miles