The calculated distance (air line) between Nowy Dwór Gdański and Gdańsk is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Gdańsk is certainly longer, as only the direct route (as the crow flies) between Nowy Dwór Gdański and Gdańsk has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles