The calculated distance (air line) between Romans-sur-Isère and Clermont-Ferrand is approximately 108 miles respectively 175 kilometers.
By car or train, the actual journey to Clermont-Ferrand is certainly longer, as only the direct route (as the crow flies) between Romans-sur-Isère and Clermont-Ferrand has been calculated here.
Air line (approximately)
175 kilometers
94 nautical miles