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