The calculated distance (air line) between Atlit and Rishon LeTsiyyon is approximately 50 miles respectively 81 kilometers.
By car or train, the actual journey to Rishon LeTsiyyon is certainly longer, as only the direct route (as the crow flies) between Atlit and Rishon LeTsiyyon has been calculated here.
Air line (approximately)
81 kilometers
44 nautical miles