The calculated distance (air line) between Nowe Miasto Lubawskie and Olsztyn is approximately 44 miles respectively 72 kilometers.
By car or train, the actual journey to Olsztyn is certainly longer, as only the direct route (as the crow flies) between Nowe Miasto Lubawskie and Olsztyn has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles