The calculated distance (air line) between Jerez de la Frontera and Villamartín is approximately 30 miles respectively 48 kilometers.
By car or train, the actual journey to Villamartín is certainly longer, as only the direct route (as the crow flies) between Jerez de la Frontera and Villamartín has been calculated here.
Air line (approximately)
48 kilometers
26 nautical miles