The calculated distance (air line) between Alicante and Guardamar del Segura is approximately 20 miles respectively 32 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 Alicante and Guardamar del Segura has been calculated here.
Air line (approximately)
32 kilometers
17 nautical miles