The calculated distance (air line) between Bétaré Oya and Ngaoundéré is approximately 124 miles respectively 200 kilometers.
By car or train, the actual journey to Ngaoundéré is certainly longer, as only the direct route (as the crow flies) between Bétaré Oya and Ngaoundéré has been calculated here.
Air line (approximately)
200 kilometers
108 nautical miles