The calculated distance (air line) between Mananara and Fenoarivo Atsinanana is approximately 87 miles respectively 140 kilometers.
By car or train, the actual journey to Fenoarivo Atsinanana is certainly longer, as only the direct route (as the crow flies) between Mananara and Fenoarivo Atsinanana has been calculated here.
Air line (approximately)
140 kilometers
76 nautical miles