The calculated distance (air line) between Lviv and Staryi Dobrotvir is approximately 31 miles respectively 51 kilometers.
By car or train, the actual journey to Staryi Dobrotvir is certainly longer, as only the direct route (as the crow flies) between Lviv and Staryi Dobrotvir has been calculated here.
Air line (approximately)
51 kilometers
27 nautical miles