The calculated distance (air line) between ‘Omer and Rishon LeTsiyyon is approximately 49 miles respectively 79 kilometers.
By car or train, the actual journey to Rishon LeTsiyyon is certainly longer, as only the direct route (as the crow flies) between ‘Omer and Rishon LeTsiyyon has been calculated here.
Air line (approximately)
79 kilometers
42 nautical miles