The calculated distance (air line) between Doña Mencía and Jerez de la Frontera is approximately 115 miles respectively 185 kilometers.
By car or train, the actual journey to Jerez de la Frontera is certainly longer, as only the direct route (as the crow flies) between Doña Mencía and Jerez de la Frontera has been calculated here.
Air line (approximately)
185 kilometers
100 nautical miles