The calculated distance (air line) between Dammartin-en-Goële and Le Havre is approximately 120 miles respectively 193 kilometers.
By car or train, the actual journey to Le Havre is certainly longer, as only the direct route (as the crow flies) between Dammartin-en-Goële and Le Havre has been calculated here.
Air line (approximately)
193 kilometers
104 nautical miles