The calculated distance (air line) between Basse-Terre and Pointe-Noire is approximately 17 miles respectively 27 kilometers.
By car or train, the actual journey to Pointe-Noire is certainly longer, as only the direct route (as the crow flies) between Basse-Terre and Pointe-Noire has been calculated here.
Air line (approximately)
27 kilometers
14 nautical miles