The calculated distance (air line) between Nahiyat Ghammas and Ad Dīwānīyah is approximately 25 miles respectively 40 kilometers.
By car or train, the actual journey to Ad Dīwānīyah is certainly longer, as only the direct route (as the crow flies) between Nahiyat Ghammas and Ad Dīwānīyah has been calculated here.
Air line (approximately)
40 kilometers
22 nautical miles