The calculated distance (air line) between Champagne-sur-Seine and Paris 19 Buttes-Chaumont is approximately 38 miles respectively 62 kilometers.
By car or train, the actual journey to Paris 19 Buttes-Chaumont is certainly longer, as only the direct route (as the crow flies) between Champagne-sur-Seine and Paris 19 Buttes-Chaumont has been calculated here.
Air line (approximately)
62 kilometers
33 nautical miles