The calculated distance (air line) between Rovinj and Ronchi dei Legionari is approximately 52 miles respectively 83 kilometers.
By car or train, the actual journey to Ronchi dei Legionari is certainly longer, as only the direct route (as the crow flies) between Rovinj and Ronchi dei Legionari has been calculated here.
Air line (approximately)
83 kilometers
45 nautical miles