The calculated distance (air line) between Bnei Ayish and Rishon LeTsiyyon is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Rishon LeTsiyyon is certainly longer, as only the direct route (as the crow flies) between Bnei Ayish and Rishon LeTsiyyon has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles