The calculated distance (air line) between Nāḩīyat Saddat al Hindīyah and As Samawah is approximately 113 miles respectively 181 kilometers.
By car or train, the actual journey to As Samawah is certainly longer, as only the direct route (as the crow flies) between Nāḩīyat Saddat al Hindīyah and As Samawah has been calculated here.
Air line (approximately)
181 kilometers
98 nautical miles