The calculated distance (air line) between Ahero and Ongata Rongai is approximately 153 miles respectively 246 kilometers.
By car or train, the actual journey to Ongata Rongai is certainly longer, as only the direct route (as the crow flies) between Ahero and Ongata Rongai has been calculated here.
Air line (approximately)
246 kilometers
133 nautical miles