The calculated distance (air line) between Rahat and Rishon LeTsiyyon is approximately 40 miles respectively 64 kilometers.
By car or train, the actual journey to Rishon LeTsiyyon is certainly longer, as only the direct route (as the crow flies) between Rahat and Rishon LeTsiyyon has been calculated here.
Air line (approximately)
64 kilometers
35 nautical miles