The calculated distance (air line) between Sevilla and Mairena del Alcor is approximately 12 miles respectively 20 kilometers.
By car or train, the actual journey to Mairena del Alcor is certainly longer, as only the direct route (as the crow flies) between Sevilla and Mairena del Alcor has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles