The calculated distance (air line) between Ḩayy al Quwaysimah and Ar Ramthā is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to Ar Ramthā is certainly longer, as only the direct route (as the crow flies) between Ḩayy al Quwaysimah and Ar Ramthā has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles