The calculated distance (air line) between Mevasseret Tsiyyon and Herzliya is approximately 32 miles respectively 51 kilometers.
By car or train, the actual journey to Herzliya is certainly longer, as only the direct route (as the crow flies) between Mevasseret Tsiyyon and Herzliya has been calculated here.
Air line (approximately)
51 kilometers
27 nautical miles