The calculated distance (air line) between Radzyń Podlaski and Śródmieście is approximately 75 miles respectively 120 kilometers.
By car or train, the actual journey to Śródmieście is certainly longer, as only the direct route (as the crow flies) between Radzyń Podlaski and Śródmieście has been calculated here.
Air line (approximately)
120 kilometers
65 nautical miles