The calculated distance (air line) between Ar Rumaythah and Al Hārithah is approximately 165 miles respectively 265 kilometers.
By car or train, the actual journey to Al Hārithah is certainly longer, as only the direct route (as the crow flies) between Ar Rumaythah and Al Hārithah has been calculated here.
Air line (approximately)
265 kilometers
143 nautical miles