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