The calculated distance (air line) between Macouria and Saint-Laurent-du-Maroni is approximately 121 miles respectively 195 kilometers.
By car or train, the actual journey to Saint-Laurent-du-Maroni is certainly longer, as only the direct route (as the crow flies) between Macouria and Saint-Laurent-du-Maroni has been calculated here.
Air line (approximately)
195 kilometers
105 nautical miles