The calculated distance (air line) between ‘Ohonua and Nuku‘alofa is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Nuku‘alofa is certainly longer, as only the direct route (as the crow flies) between ‘Ohonua and Nuku‘alofa has been calculated here.
Air line (approximately)
34 kilometers
18 nautical miles