The calculated distance (air line) between Budapest XXII. kerület and Dunaújváros is approximately 32 miles respectively 52 kilometers.
By car or train, the actual journey to Dunaújváros is certainly longer, as only the direct route (as the crow flies) between Budapest XXII. kerület and Dunaújváros has been calculated here.
Air line (approximately)
52 kilometers
28 nautical miles