The calculated distance (air line) between Vigonovo-Fontanafredda and Trieste is approximately 64 miles respectively 103 kilometers.
By car or train, the actual journey to Trieste is certainly longer, as only the direct route (as the crow flies) between Vigonovo-Fontanafredda and Trieste has been calculated here.
Air line (approximately)
103 kilometers
55 nautical miles