The calculated distance (air line) between Konstantynów Łódzki and Kielce is approximately 83 miles respectively 133 kilometers.
By car or train, the actual journey to Kielce is certainly longer, as only the direct route (as the crow flies) between Konstantynów Łódzki and Kielce has been calculated here.
Air line (approximately)
133 kilometers
72 nautical miles