The calculated distance (air line) between Sumusţā as Sulţānī and Al Fashn is approximately 7 miles respectively 11 kilometers.
By car or train, the actual journey to Al Fashn is certainly longer, as only the direct route (as the crow flies) between Sumusţā as Sulţānī and Al Fashn has been calculated here.
Air line (approximately)
11 kilometers
6 nautical miles