The calculated distance (air line) between An Nāşirīyah and Msalātah is approximately 68 miles respectively 109 kilometers.
By car or train, the actual journey to Msalātah is certainly longer, as only the direct route (as the crow flies) between An Nāşirīyah and Msalātah has been calculated here.
Air line (approximately)
109 kilometers
59 nautical miles