The calculated distance (air line) between Abū Ghurayb and As Samawah is approximately 151 miles respectively 243 kilometers.
By car or train, the actual journey to As Samawah is certainly longer, as only the direct route (as the crow flies) between Abū Ghurayb and As Samawah has been calculated here.
Air line (approximately)
243 kilometers
131 nautical miles