The calculated distance (air line) between Santa Marta de Ortigueira and Oviedo is approximately 103 miles respectively 166 kilometers.
By car or train, the actual journey to Oviedo is certainly longer, as only the direct route (as the crow flies) between Santa Marta de Ortigueira and Oviedo has been calculated here.
Air line (approximately)
166 kilometers
89 nautical miles