The calculated distance (air line) between Lenart v Slov. Goricah and Nova Gorica is approximately 113 miles respectively 181 kilometers.
By car or train, the actual journey to Nova Gorica is certainly longer, as only the direct route (as the crow flies) between Lenart v Slov. Goricah and Nova Gorica has been calculated here.
Air line (approximately)
181 kilometers
98 nautical miles