The calculated distance (air line) between Montluçon and Marne La Vallée is approximately 172 miles respectively 278 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 Montluçon and Marne La Vallée has been calculated here.
Air line (approximately)
278 kilometers
150 nautical miles