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