The calculated distance (air line) between Aş Şanamayn and Dūmā is approximately 37 miles respectively 59 kilometers.
By car or train, the actual journey to Dūmā is certainly longer, as only the direct route (as the crow flies) between Aş Şanamayn and Dūmā has been calculated here.
Air line (approximately)
59 kilometers
32 nautical miles