The calculated distance (air line) between Sokołów Podlaski and Śródmieście is approximately 54 miles respectively 86 kilometers.
By car or train, the actual journey to Śródmieście is certainly longer, as only the direct route (as the crow flies) between Sokołów Podlaski and Śródmieście has been calculated here.
Air line (approximately)
86 kilometers
47 nautical miles