The calculated distance (air line) between Wieluń and Bielsko-Biala is approximately 99 miles respectively 159 kilometers.
By car or train, the actual journey to Bielsko-Biala is certainly longer, as only the direct route (as the crow flies) between Wieluń and Bielsko-Biala has been calculated here.
Air line (approximately)
159 kilometers
86 nautical miles