The calculated distance (air line) between Chartres-de-Bretagne and Dol-de-Bretagne is approximately 35 miles respectively 57 kilometers.
By car or train, the actual journey to Dol-de-Bretagne is certainly longer, as only the direct route (as the crow flies) between Chartres-de-Bretagne and Dol-de-Bretagne has been calculated here.
Air line (approximately)
57 kilometers
31 nautical miles