The calculated distance (air line) between Mwatate and Ongata Rongai is approximately 183 miles respectively 295 kilometers.
By car or train, the actual journey to Ongata Rongai is certainly longer, as only the direct route (as the crow flies) between Mwatate and Ongata Rongai has been calculated here.
Air line (approximately)
295 kilometers
159 nautical miles