The calculated distance (air line) between Châteaurenard and Clermont-Ferrand is approximately 157 miles respectively 253 kilometers.
By car or train, the actual journey to Clermont-Ferrand is certainly longer, as only the direct route (as the crow flies) between Châteaurenard and Clermont-Ferrand has been calculated here.
Air line (approximately)
253 kilometers
136 nautical miles