The calculated distance (air line) between Maua and Ongata Rongai is approximately 139 miles respectively 223 kilometers.
By car or train, the actual journey to Ongata Rongai is certainly longer, as only the direct route (as the crow flies) between Maua and Ongata Rongai has been calculated here.
Air line (approximately)
223 kilometers
121 nautical miles