The calculated distance (air line) between Douvres-la-Délivrande and Lille is approximately 179 miles respectively 287 kilometers.
By car or train, the actual journey to Lille is certainly longer, as only the direct route (as the crow flies) between Douvres-la-Délivrande and Lille has been calculated here.
Air line (approximately)
287 kilometers
155 nautical miles