The calculated distance (air line) between Ille-sur-Têt and Montpellier is approximately 91 miles respectively 146 kilometers.
By car or train, the actual journey to Montpellier is certainly longer, as only the direct route (as the crow flies) between Ille-sur-Têt and Montpellier has been calculated here.
Air line (approximately)
146 kilometers
79 nautical miles