By plane
Nearby airports are Turin, Geneva, and Lyon. Usually, once at the airport, you can reach Aussois by train (see below) from the nearest station or renting a car.
By train
Nearby Gare de Modane is a large railway station with a high-speed TGV trains, which connect Paris - Chambéry - Turin - Milan. You can check and book your ticket here.
By car
The centre Paul Langevin (19 Rue du Coin, 73500 Aussois, France; 45.232713688970605, 6.744431203165686) is about 11 km away from the Frejus tunnel motorway connecting Torino and Albertville/Chambery/Grenoble.