The calculated distance (air line) between Pernes-les-Fontaines and Montpellier is approximately 65 miles respectively 104 kilometers.
By car or train, the actual journey to Montpellier is certainly longer, as only the direct route (as the crow flies) between Pernes-les-Fontaines and Montpellier has been calculated here.
Air line (approximately)
104 kilometers
56 nautical miles