The calculated distance (air line) between Nikki and Dassa-Zoumé is approximately 167 miles respectively 268 kilometers.
By car or train, the actual journey to Dassa-Zoumé is certainly longer, as only the direct route (as the crow flies) between Nikki and Dassa-Zoumé has been calculated here.
Air line (approximately)
268 kilometers
145 nautical miles