The calculated distance (air line) between Ar Rumaythīyah and Ad Dasmah is approximately 6 miles respectively 9 kilometers.
By car or train, the actual journey to Ad Dasmah is certainly longer, as only the direct route (as the crow flies) between Ar Rumaythīyah and Ad Dasmah has been calculated here.
Air line (approximately)
9 kilometers
5 nautical miles