The calculated distance (air line) between L'Haÿ-les-Roses and Reims is approximately 84 miles respectively 135 kilometers.
By car or train, the actual journey to Reims is certainly longer, as only the direct route (as the crow flies) between L'Haÿ-les-Roses and Reims has been calculated here.
Air line (approximately)
135 kilometers
73 nautical miles