The calculated distance (air line) between Santa Marta de Ortigueira and Betanzos is approximately 33 miles respectively 54 kilometers.
By car or train, the actual journey to Betanzos is certainly longer, as only the direct route (as the crow flies) between Santa Marta de Ortigueira and Betanzos has been calculated here.
Air line (approximately)
54 kilometers
29 nautical miles