The calculated distance (air line) between Saint-Vallier and Marne La Vallée is approximately 172 miles respectively 276 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 Saint-Vallier and Marne La Vallée has been calculated here.
Air line (approximately)
276 kilometers
149 nautical miles