The calculated distance (air line) between Choisy-le-Roi and Marne La Vallée is approximately 11 miles respectively 18 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 Choisy-le-Roi and Marne La Vallée has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles