The calculated distance (air line) between Shoham and Rishon LeTsiyyon is approximately 9 miles respectively 15 kilometers.
By car or train, the actual journey to Rishon LeTsiyyon is certainly longer, as only the direct route (as the crow flies) between Shoham and Rishon LeTsiyyon has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles