The calculated distance (air line) between Sant Carles de la Ràpita and Sant Martí is approximately 100 miles respectively 161 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 Carles de la Ràpita and Sant Martí has been calculated here.
Air line (approximately)
161 kilometers
87 nautical miles