The calculated distance (air line) between Crépy-en-Valois and Marne La Vallée is approximately 30 miles respectively 48 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 Crépy-en-Valois and Marne La Vallée has been calculated here.
Air line (approximately)
48 kilometers
26 nautical miles