The calculated distance (air line) between Pont-à-Mousson and Marne La Vallée is approximately 155 miles respectively 250 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 Pont-à-Mousson and Marne La Vallée has been calculated here.
Air line (approximately)
250 kilometers
135 nautical miles