The calculated distance (air line) between Az Zubayr and Ar Rumaythīyah is approximately 78 miles respectively 125 kilometers.
By car or train, the actual journey to Ar Rumaythīyah is certainly longer, as only the direct route (as the crow flies) between Az Zubayr and Ar Rumaythīyah has been calculated here.
Air line (approximately)
125 kilometers
68 nautical miles