The calculated distance (air line) between Ar Rumaythah and Al Musayyib is approximately 102 miles respectively 163 kilometers.
By car or train, the actual journey to Al Musayyib is certainly longer, as only the direct route (as the crow flies) between Ar Rumaythah and Al Musayyib has been calculated here.
Air line (approximately)
163 kilometers
88 nautical miles