The calculated distance (air line) between Saint-Berthevin and Marne La Vallée is approximately 168 miles respectively 270 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-Berthevin and Marne La Vallée has been calculated here.
Air line (approximately)
270 kilometers
145 nautical miles