The calculated distance (air line) between Murcia and Guardamar del Segura is approximately 27 miles respectively 43 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 Murcia and Guardamar del Segura has been calculated here.
Air line (approximately)
43 kilometers
23 nautical miles