The calculated distance (air line) between Labarthe-sur-Lèze and Montpellier is approximately 125 miles respectively 200 kilometers.
By car or train, the actual journey to Montpellier is certainly longer, as only the direct route (as the crow flies) between Labarthe-sur-Lèze and Montpellier has been calculated here.
Air line (approximately)
200 kilometers
108 nautical miles