The calculated distance (air line) between Monforte del Cid and Guardamar del Segura is approximately 20 miles respectively 33 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 Monforte del Cid and Guardamar del Segura has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles