Lyon Airport (LYS)
This is a good airport all year round, with a great choice of scheduled services. It's around 2 hours to Alpe d'Huez & Les 2 Alpes.
Local tip: there is a TGV railway station attached to the airport that's well worth a look - it's an architectural marvel designed by Santiago Calatrava. You can get to it via a walkway from the airport terminal. The airport also has an app - unimagintavely named "Lyon Airport" - it's good for tracking flight info.