The calculated distance (air line) between La Roque-d'Anthéron and Montpellier is approximately 72 miles respectively 116 kilometers.
By car or train, the actual journey to Montpellier is certainly longer, as only the direct route (as the crow flies) between La Roque-d'Anthéron and Montpellier has been calculated here.
Air line (approximately)
116 kilometers
63 nautical miles