The calculated distance (air line) between Jerez de la Frontera and Dos Hermanas is approximately 43 miles respectively 69 kilometers.
By car or train, the actual journey to Dos Hermanas is certainly longer, as only the direct route (as the crow flies) between Jerez de la Frontera and Dos Hermanas has been calculated here.
Air line (approximately)
69 kilometers
37 nautical miles