The calculated distance (air line) between Az Zuwāydah and Rafaḩ is approximately 13 miles respectively 20 kilometers.
By car or train, the actual journey to Rafaḩ is certainly longer, as only the direct route (as the crow flies) between Az Zuwāydah and Rafaḩ has been calculated here.
Air line (approximately)
20 kilometers
11 nautical miles