The calculated distance (air line) between Reims and Rueil-Malmaison is approximately 87 miles respectively 141 kilometers.
By car or train, the actual journey to Rueil-Malmaison is certainly longer, as only the direct route (as the crow flies) between Reims and Rueil-Malmaison has been calculated here.
Air line (approximately)
141 kilometers
76 nautical miles