The calculated distance (air line) between Bourg-lès-Valence and Saint-Étienne is approximately 42 miles respectively 67 kilometers.
By car or train, the actual journey to Saint-Étienne is certainly longer, as only the direct route (as the crow flies) between Bourg-lès-Valence and Saint-Étienne has been calculated here.
Air line (approximately)
67 kilometers
36 nautical miles