The calculated distance (air line) between Loos-en-Gohelle and Le Havre is approximately 137 miles respectively 220 kilometers.
By car or train, the actual journey to Le Havre is certainly longer, as only the direct route (as the crow flies) between Loos-en-Gohelle and Le Havre has been calculated here.
Air line (approximately)
220 kilometers
119 nautical miles