The calculated distance (air line) between Bourg-de-Péage and Montpellier is approximately 114 miles respectively 183 kilometers.
By car or train, the actual journey to Montpellier is certainly longer, as only the direct route (as the crow flies) between Bourg-de-Péage and Montpellier has been calculated here.
Air line (approximately)
183 kilometers
99 nautical miles