The calculated distance (air line) between San Martino Buon Albergo and Parma is approximately 57 miles respectively 92 kilometers.
By car or train, the actual journey to Parma is certainly longer, as only the direct route (as the crow flies) between San Martino Buon Albergo and Parma has been calculated here.
Air line (approximately)
92 kilometers
50 nautical miles