The calculated distance (air line) between Poponguine and Ndibène Dahra is approximately 122 miles respectively 196 kilometers.
By car or train, the actual journey to Ndibène Dahra is certainly longer, as only the direct route (as the crow flies) between Poponguine and Ndibène Dahra has been calculated here.
Air line (approximately)
196 kilometers
106 nautical miles