The calculated distance (air line) between Sant Vicenç de Montalt and Sant Martí is approximately 19 miles respectively 31 kilometers.
By car or train, the actual journey to Sant Martí is certainly longer, as only the direct route (as the crow flies) between Sant Vicenç de Montalt and Sant Martí has been calculated here.
Air line (approximately)
31 kilometers
17 nautical miles