Les Arcs is 150km from Geneva International Airport about a 2 hour direct bus ride.
It is 620km from Paris where a TGV train can be caught to Bourg Saint Maurice Train Station in under 5 hours.
On Saturdays the Eurostar from London operates into Bourg Saint Maurice Station taking 8 hours.
From Bourg Saint Maurice it is a short bus or taxi ride to Les Arcs. Rental cars, taxis and shuttle buses are available for hire at the train station.