Yes. If an Ikon Pass holder uses the Skyway Monte Biano a day will be deducted from your pass. However, if you also access any of the five mountains at Valle d’Aosta on the same day - Courmayeur Mont Blanc, Cervino Ski Paradise, La Thuile Espace San Bernardo, Monterosa Ski and Pila - only one day will be deducted.