The calculated distance (air line) between Madīnat an Naşr and Ashmūn is approximately 25 miles respectively 40 kilometers.
By car or train, the actual journey to Ashmūn is certainly longer, as only the direct route (as the crow flies) between Madīnat an Naşr and Ashmūn has been calculated here.
Air line (approximately)
40 kilometers
22 nautical miles