The calculated distance (air line) between Shubrā al Khaymah and Ashmūn is approximately 20 miles respectively 33 kilometers.
By car or train, the actual journey to Ashmūn is certainly longer, as only the direct route (as the crow flies) between Shubrā al Khaymah and Ashmūn has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles