The calculated distance (air line) between Al Qunayţirah and Dūmā is approximately 45 miles respectively 73 kilometers.
By car or train, the actual journey to Dūmā is certainly longer, as only the direct route (as the crow flies) between Al Qunayţirah and Dūmā has been calculated here.
Air line (approximately)
73 kilometers
39 nautical miles