The calculated distance (air line) between Aire-sur-la-Lys and Le Havre is approximately 129 miles respectively 207 kilometers.
By car or train, the actual journey to Le Havre is certainly longer, as only the direct route (as the crow flies) between Aire-sur-la-Lys and Le Havre has been calculated here.
Air line (approximately)
207 kilometers
112 nautical miles