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