The calculated distance (air line) between Sainte-Adresse and Marne La Vallée is approximately 125 miles respectively 200 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 Sainte-Adresse and Marne La Vallée has been calculated here.
Air line (approximately)
200 kilometers
108 nautical miles