The calculated distance (air line) between Sanlúcar la Mayor and Jerez de la Frontera is approximately 49 miles respectively 78 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 Sanlúcar la Mayor and Jerez de la Frontera has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles