The calculated distance (air line) between Ronchi dei Legionari and Monfalcone is approximately 2 miles respectively 3 kilometers.
By car or train, the actual journey to Monfalcone is certainly longer, as only the direct route (as the crow flies) between Ronchi dei Legionari and Monfalcone has been calculated here.
Air line (approximately)
3 kilometers
2 nautical miles