Grenoble Airport (GNB)
This airport is small. The arrivals area is not much more than a tent, but it does have a great choice of winter flights. Being small, access is good. Beware, it's actually 40km out of Grenoble on the north-west side, not a million miles from Lyon airport. It is a nice short transfer in to the resorts of the Oisans - 1 hour 30 mins without traffic.
Local tip: there's not a great deal in the airport itself - if you're bored, wander out to the Grillon pizza restaurant just by the airport entrance. There's also a McDonald's just over the roundabout from the airport if you're peckish. There's also a large Super U supermarket over there.