The calculated distance (air line) between Ronchi dei Legionari and Šempeter pri Gorici is approximately 10 miles respectively 15 kilometers.
By car or train, the actual journey to Šempeter pri Gorici is certainly longer, as only the direct route (as the crow flies) between Ronchi dei Legionari and Šempeter pri Gorici has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles