The calculated distance (air line) between Al Faḩāḩīl and Ad Dasmah is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Ad Dasmah is certainly longer, as only the direct route (as the crow flies) between Al Faḩāḩīl and Ad Dasmah has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles