The calculated distance (air line) between Bruay-sur-l'Escaut and Le Havre is approximately 165 miles respectively 266 kilometers.
By car or train, the actual journey to Le Havre is certainly longer, as only the direct route (as the crow flies) between Bruay-sur-l'Escaut and Le Havre has been calculated here.
Air line (approximately)
266 kilometers
143 nautical miles