The nearest airports are Geneva (3hrs),
Lyon (2.5hrs), Grenoble (2.5hrs) and Chambery (1.5hrs). In the winter months
there are direct bus services operating from these airports to resort (do make
sure that you check the timetables before booking flights) but in the summer it
is more complicated and can involve train journeys with multiple changes.
Major airports near Lyon, France:
Lyon-Saint Exupéry