The calculated distance (air line) between Kecskemét and Dunaújváros is approximately 36 miles respectively 57 kilometers.
By car or train, the actual journey to Dunaújváros is certainly longer, as only the direct route (as the crow flies) between Kecskemét and Dunaújváros has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles