The calculated distance (air line) between L'Haÿ-les-Roses and Le Havre is approximately 112 miles respectively 181 kilometers.
By car or train, the actual journey to Le Havre is certainly longer, as only the direct route (as the crow flies) between L'Haÿ-les-Roses and Le Havre has been calculated here.
Air line (approximately)
181 kilometers
97 nautical miles