The calculated distance (air line) between Fouquières-lès-Lens and Le Havre is approximately 140 miles respectively 226 kilometers.
By car or train, the actual journey to Le Havre is certainly longer, as only the direct route (as the crow flies) between Fouquières-lès-Lens and Le Havre has been calculated here.
Air line (approximately)
226 kilometers
122 nautical miles