The calculated distance (air line) between Berck-Plage and Marne La Vallée is approximately 119 miles respectively 191 kilometers.
By car or train, the actual journey to Marne La Vallée is certainly longer, as only the direct route (as the crow flies) between Berck-Plage and Marne La Vallée has been calculated here.
Air line (approximately)
191 kilometers
103 nautical miles