The calculated distance (air line) between Soanierana Ivongo and Toamasina is approximately 86 miles respectively 138 kilometers.
By car or train, the actual journey to Toamasina is certainly longer, as only the direct route (as the crow flies) between Soanierana Ivongo and Toamasina has been calculated here.
Air line (approximately)
138 kilometers
75 nautical miles