The calculated distance (air line) between Montereau-Fault-Yonne and Marne La Vallée is approximately 34 miles respectively 55 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 Montereau-Fault-Yonne and Marne La Vallée has been calculated here.
Air line (approximately)
55 kilometers
30 nautical miles