The calculated distance (air line) between Saint-André-lez-Lille and Le Havre is approximately 154 miles respectively 247 kilometers.
By car or train, the actual journey to Le Havre is certainly longer, as only the direct route (as the crow flies) between Saint-André-lez-Lille and Le Havre has been calculated here.
Air line (approximately)
247 kilometers
133 nautical miles